Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0e91c87b9d847e…

MALICIOUS

PDF

52.8 KB Created: 2020-07-31 08:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7707a12aa70ea13a04321de6b668a97a SHA-1: 01761a3a390e8753d66056bafb617c9ab39aa188 SHA-256: 9f0e91c87b9d847ef114ddc0fdf55e13d16fa8e08d535f2de64a47eff6080478
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, including one identified as a malicious redirector hosted on ttraff.ru. The presence of a 'download button' heuristic and the embedded URL suggest a social engineering tactic to trick users into clicking the malicious link. The document body is heavily obfuscated and appears to be generated content, likely to mask the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.ru/pify?keyword=uml+activity+diagram+example+pdf In PDF document text
    • http://files.jessicaritacco.com/uploads/1/3/1/1/131163492/gitaxurekemuvi.pdfIn PDF document text
    • http://files.casa-collective.com/uploads/1/3/0/9/130969768/7834245.pdfIn PDF document text
    • http://files.impactdesign.co/uploads/1/3/1/4/131483031/6393183.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5027/7783/files/duzosizezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/lofalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/65353825967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/gotob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/zunusijelewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8513/5014/files/69247548173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/55815088097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5509/4679/files/walojizaxisunukevaliwenet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/92059520220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7352/6178/files/kojifumofokebubemeketim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/babafutafigunaledu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/66951033887.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
🗂 Part of campaign: casa-collective.com 10 samples

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000916c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x916C 5092 bytes
SHA-256: 09e9ec54c4045a6a88bb90488349d4f1d167259e35265ce8cefa20f854aded66
font_01_sfnt_off0000a2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2CF 10404 bytes
SHA-256: 93caded165a3aa6d116dfb39221b496bf234deda4d8ed5f90a62fba14054761b

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