Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff96b1a15431a75…

MALICIOUS

PDF

49.3 KB Created: 2020-08-14 10:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7143d5e3c0e34814274e9b77464681b6 SHA-1: 3b095bfdfe449ca2cede7259eab0296930750759 SHA-256: 4ff96b1a15431a751a9e6f5db984b9d1759cbb12e95edc6fa53ecd08531e0d57
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to `ttraff.ru`, identified as malicious. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure for a 'catchphrase quiz'. This suggests a phishing or social engineering attack aiming to redirect users to malicious content. No scripts were extracted, limiting the analysis of further stages.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=catchphrase+quiz+and+answers In PDF document text
    • http://files.kennedycustomprops.com/uploads/1/3/0/7/130776298/namiviwidibunibeko.pdfIn PDF document text
    • http://files.wrenphotographynd.com/uploads/1/3/0/9/130969657/woxafot.pdfIn PDF document text
    • http://menag.cardiaone.com/uploads/1/3/1/0/131070450/laxebi.pdfIn PDF document text
    • http://files.disinfection-protection.co.uk/uploads/1/3/1/6/131637226/f6206329.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/centrifugal_and_axial_flow_pumps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18491093394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6908/7642/files/codeword_barbelon_danger_in_the_vatican.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0198/6723/files/widigazojoketavotanim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/bedigifesiroxurum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/mevuvef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/28580415911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6367/0944/files/84994058831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/servsafe_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/vaweguwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/fugupefurejikikam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/rutosomasukula.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E6 5192 bytes
SHA-256: fd3acbe4c916f2c93de1628e4685a29925e96b6c0b43b38a1b5e347717307a6d
font_01_sfnt_off0000879a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879A 10120 bytes
SHA-256: deb2dd580d70eabf4d34dcf10fa178e05e417042cc878c9deee6ba574bcc06bd
font_02_sfnt_off0000aa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378