Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31c61572fde511c…

MALICIOUS

PDF

42.6 KB Created: 2020-08-13 22:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5111fcd2dceb3937a541b561b2c99ffe SHA-1: 66b16c28fd475b6bff6fc5e1ef89a96ff5d84ce8 SHA-256: a31c61572fde511c52e295bd7971e0981ae7ec9ff1d40a6eeb357458ced06437
282 Risk Score

Malware Insights

MITRE ATT&CK
T1204 User Execution T1204.002 User Execution: Malicious File T1059 Command and Scripting Interpreter T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF contains a malicious redirector link and a link farm, indicating a social engineering lure. The document body and heuristics suggest the user is instructed to copy and paste commands, consistent with ClickFix attacks designed to bypass macro restrictions. The primary malicious URL is https://ttraff.cc/pify?keyword=gdi32.+dll+for+windows+8, which likely serves as a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=gdi32.+dll+for+windows+8 In PDF document text
    • http://files.bittermansguide.com/uploads/1/3/1/3/131398135/gogezam-feserufuluwojij-nuxajasonope.pdfIn PDF document text
    • http://duxejod.somethingsoldsomethingsnew.com/uploads/1/3/2/7/132710780/dokoxi.pdfIn PDF document text
    • http://files.oace.co/uploads/1/3/1/3/131381781/parotakime.pdfIn PDF document text
    • http://files.faisslibrary.com/uploads/1/3/2/3/132302970/nagevinemenogozon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/38207921179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2543/8619/files/brand_awareness_measurement_scale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/31451408515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4460/0999/files/kenmore_sewing_machine_model_158_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1281/6034/files/71228512008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9065/7951/files/kavajufekawuladubikew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/30743104280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/71808694801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/ripogebaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/port_open_check.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/kegigavirimopin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2264/6422/files/kafelalipafomowufu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F53 5336 bytes
SHA-256: 0d5bfefbafe785a8daf17f0eae0357e20ec6a2a03045d5f5f0cae8dc3e377811
font_01_sfnt_off000071a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A4 10148 bytes
SHA-256: f6d8ecdcd1a397b3d068347db90158c49fcc1db3c0c8ea1bbdf92044af7ce9e2
font_02_sfnt_off00009470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9470 2072 bytes
SHA-256: 99dc99f891051cdbd138958a66ea6383a557cc7486c0c5acb0cb3ed99139840e

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