Malicious PDF — malware analysis report

Static analysis result for SHA-256 1877fe80fb0107f0…

MALICIOUS

PDF

44.9 KB Created: 2020-08-11 07:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 258f8e17b61f0d611a8f87358f906c77 SHA-1: ef2afbcfa65584e22164f42961b76548c6478845 SHA-256: 1877fe80fb0107f025c72a556e20c0be692101c40437e4c2127ba95aa75f31fe
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains multiple links to a redirector service, which in turn points to a large collection of other PDFs hosted on Shopify. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to drive traffic to this link farm. The primary redirector URL is https://ttraff.cc/pify?keyword=cambridge+english+dictionary+free+download+full+version+pdf, which is designed to appear as a search result for a free dictionary download.

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=cambridge+english+dictionary+free+download+full+version+pdf In PDF document text
    • http://nupajuwof.bethlehem-morristown.org/uploads/1/3/1/3/131381679/4c93f1b46aead.pdfIn PDF document text
    • http://vatozib.littlegemskaren.co.uk/uploads/1/3/1/4/131453177/zitorunegaretotawi.pdfIn PDF document text
    • http://jabimege.collinssarsfield.com/uploads/1/3/1/3/131383377/nakotomewibadin-bafuxus.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/1/0432/1991/0811/files/66473563044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2945/7064/files/mtodo_de_la_ovulacin_billings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7328/1948/files/zepotamix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/mapamundi_con_nombres_a_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/laruwivixureliziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/73700560467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/taduzili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6114/8832/files/87462378656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6694/0828/files/intermediate_algebra_9th_edition_bittinger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/49235927198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/20152897114.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_off00006f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F52 5868 bytes
SHA-256: 4e89a15d5700100d68a1ff1601857e8cc0bfaaa160d1717d787dea265ad1fe38
font_01_sfnt_off00008336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8336 10352 bytes
SHA-256: ef31dd6c0f502038b2a42be1ab3b7dd2338f2ac964f89a7e543ddca02cd65324

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