Malicious PDF — malware analysis report

Static analysis result for SHA-256 91815f4c0ac06778…

MALICIOUS

PDF

76.1 KB Created: 2020-08-02 21:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 87a5db36cdec5a10ef29ce22335f3f93 SHA-1: bf62abc2697fd9114ef9a8e7ecb9b9c3c4fd5bd2 SHA-256: 91815f4c0ac06778bd5b17eedbab63525fd86858b609123227eea3fb4a7872fc
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains text fragments that appear to be related to YouTube watch queues, suggesting a social engineering lure. No scripts were extracted from this sample.

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=yt+www+watchqueue+loadthumbnails In PDF document text
    • http://files.wrkimages.com/uploads/1/3/1/3/131380641/vavabuvumipe_kiwegovewulogud_xoruvuwix.pdfIn PDF document text
    • http://files.shetlanddesigner.com/uploads/1/3/1/4/131438501/a0eb149f2871.pdfIn PDF document text
    • http://files.chiarracjoseph.net/uploads/1/3/1/3/131398497/8006227.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/1/0428/8898/6787/files/63983829469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/2015_rent_certificate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/palakipelador.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/kebexiwowalumipofitetaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/filetupanitarigotaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3893/1109/files/27395046739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/rujobesuzewuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/xirurufisevosibibub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/dugikufiguja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/22339928424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0971/2033/files/how_to_mirror_an_object_in_maya.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/legub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/malinokoregotatag.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_off0000da3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3A 5404 bytes
SHA-256: dd38bf3acb820ce3f243b3772e81ac852fbcd8db6c69b7da4d0b266c557ff541
font_01_sfnt_off0000ec84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 17608 bytes
SHA-256: 46797db5d30cdb3facee3f90a4e242e919c5cb161e46273df4a480be22147559

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