Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c170e9e860f4906…

MALICIOUS

PDF

34.1 KB Created: 2020-08-04 11:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5616fd7f13f2c6c2f04480201868123 SHA-1: 40185b709ce2274b385dc35ad2da8e404fcc493d SHA-256: 1c170e9e860f4906e932752408fe2dcf0d456c317539f02f7db5cf7d201f3fe9
202 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to appear as legitimate downloads, but they redirect to malicious infrastructure. The primary redirector URL is 'https://ttraff.ru/pify?keyword=english+to+gujarati+dictionary+free+download+for+pc+pdf', which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other benign-looking Shopify links, likely part of a link farm to improve SEO for malicious content. The ML classifier strongly indicated maliciousness.

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=english+to+gujarati+dictionary+free+download+for+pc+pdf In PDF document text
    • http://files.mattnelsonreviews.com/uploads/1/3/1/6/131636843/53e8b.pdfIn PDF document text
    • http://files.grpwoodworks.com/uploads/1/3/1/3/131398504/xojumujaxuponetab.pdfIn PDF document text
    • http://files.gabisorrentino.com/uploads/1/3/1/4/131409170/d0e06c01.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/1/0429/7133/2767/files/55148813341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7236/4437/files/rumaviwupeziwenugamibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1274/3580/files/sejogelifowas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/lamopirigaxoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/burial_rites_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/gujos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/2682270322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/31170314642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/vujelalifuzaxexovixag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/san_bernardino_food_handlers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8581/5205/files/tidotizukevamikezoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/tukirigi.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_off0000484c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x484C 5644 bytes
SHA-256: c0889e205cdb6adfde5bdccb1bfbe180e3c842b21c4cdc6de55310360c710914
font_01_sfnt_off00005b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9F 9232 bytes
SHA-256: 485270c4fe449b1492dae876d3c871bd01ecee948c2a831f8926eebec3e9997e

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