Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9283cdabc2cf36…

MALICIOUS

PDF

54.4 KB Created: 2020-08-13 21:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dbf45c40a4602472f5f9037d0cb11179 SHA-1: 0f325a59b3f44ab871aaa89ad4a43807cd102fc5 SHA-256: 4d9283cdabc2cf36aa3fb568d25137d2c6cab67422b9981002f488cf345317e6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though partially corrupted, includes text related to 'Canada business corporations act form 4' and the wkhtmltopdf application, suggesting a lure. The presence of numerous embedded URLs, including the malicious redirector and a large number of Shopify-hosted PDFs, indicates a link farm or distribution mechanism. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=canada+business+corporations+act+form+4 In PDF document text
    • http://files.seattlepregnancymassage.com/uploads/1/3/1/4/131453605/b55638751.pdfIn PDF document text
    • http://files.margarettellis.com/uploads/1/3/1/8/131858592/5312341.pdfIn PDF document text
    • http://files.dreamcatcherassociation.com/uploads/1/3/1/3/131384127/ladabor-foxopu-xevezu.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/1/0437/1863/9765/files/71363785151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/68577499556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9988/1639/files/jobufisasatewafiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/56801290771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2691/3179/files/blender_select_all.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5034/4352/files/baumer_ch_8501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/tupivolomiwidotosumetuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/21320293195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0028/2785/files/database_concepts_6th_edition_kroenke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8333/3785/files/kapedekurebazoxinilokut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/79086372433.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 2

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_off00008e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6B 5400 bytes
SHA-256: 3b807e95600b9724bc8ba8f4fc812a6c47520209ac279563e1f1e3773ee40616
font_01_sfnt_off0000a0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0AE 14296 bytes
SHA-256: 73a5018ed0efa7898396ca4e7448e3dd7f2d3db3213bffd15b3da3baa2499d74

Open this report in the interactive analyzer, or submit your own file for analysis.