Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a55d5756233e94…

MALICIOUS

PDF

35.5 KB Created: 2020-08-04 15:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3508546ae09dd83bf7f156aa3d76ed04 SHA-1: a0345378c83ba3cc9255d0c63997206eb748f67f SHA-256: a7a55d5756233e94300c3e30deb1dc9c7968eb49d5479285a808125b65dc577a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector at ttraff.com. This indicates a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure. 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.com/pify?keyword=cambridge+primary+science+stage+6+learner+s+book+pdf In PDF document text
    • http://files.amaranthineartist.com/uploads/1/3/2/6/132696122/sawasoralag.pdfIn PDF document text
    • http://files.movablesconsignment.com/uploads/1/3/0/8/130813818/8ba52c.pdfIn PDF document text
    • http://files.curtfonger.com/uploads/1/3/2/6/132682441/fac409dd73ab0dc.pdfIn PDF document text
    • http://files.whirlingwindsstables.com/uploads/1/3/0/7/130738778/posasojidapajalikala.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/1/0431/9058/3464/files/rabisalusew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5458/0391/files/ginokupowaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/96866014076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/65550634586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5689/3847/files/one_piece_subbed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/japizazawalijusujulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3277/2757/files/rosepitet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/zumojuderobalow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8752/8103/files/nubakof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/99720824246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5464/2853/files/bodevawin.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 5

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_off00004a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A58 5840 bytes
SHA-256: 4e241551a807ad3b8aba50b514896900a32cfbbc4262ed0e85100f8322da0132
font_01_sfnt_off00005e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E26 10220 bytes
SHA-256: c54da44e1199634f108fbe93716de3c2611bbb741901e23992030a5e30826778

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