Malicious PDF — malware analysis report

Static analysis result for SHA-256 91cabc72323ed552…

MALICIOUS

PDF

36.7 KB Created: 2020-08-20 20:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a56e8eb69d2211cca22febf030257dcd SHA-1: cd677ae77f5661914e05d32eb45af460d4f50aa0 SHA-256: 91cabc72323ed552c28b78d01f52c3f7a4e94d62a1677ca0287df06ef13097ed
202 Risk Score

Malware Insights

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

The PDF file contains a lure for a Netflix Android app download, which is a common social engineering tactic. It embeds a link to a redirector service, ttraff.cc, which is flagged as malicious. The file also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the malicious redirector. The presence of a visual download button further supports the social engineering pretext.

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.cc/pify?keyword=netflix+para+android+4.+1.+2 In PDF document text
    • http://files.sghwoodturning.com/uploads/1/3/1/8/131856039/sijuponebose_beketeloloxoti_wuzoneva.pdfIn PDF document text
    • http://files.stmarks-benson.com/uploads/1/3/1/6/131636866/7e15335.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/1/0431/5312/9640/files/wavaguz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1515/9458/files/brush_lettering_practice_sheets_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/assassin_s_creed_origins_wiki_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/76351058819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2248/2582/files/lobovafisilekege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9392/3742/files/turoludotapisok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2095/1450/files/32021391234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/zadoduju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/99015024652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/9922200253.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: stmarks-benson.com 6 samples

Related samples 4

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_off000052ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52AB 5196 bytes
SHA-256: 19a347d59b47ac30d7b2763f95305379290fa238ea369bcba0dcaa6eda7adc6c
font_01_sfnt_off0000647f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647F 9956 bytes
SHA-256: f539b601a57246607c436fbc590caba0d2f0b87a9bab067b57d9105fdb4a9947

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