Malicious PDF — malware analysis report

Static analysis result for SHA-256 98dff05acf88776d…

MALICIOUS

PDF

43.6 KB Created: 2020-08-06 23:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a281a3ce0feb8d65477ffe9705a8b72b SHA-1: a7ce32bdb1c95a9844ef8ef9e9c0540bc85399a4 SHA-256: 98dff05acf88776dced2236223a48106457d8bbb24e2d5d52a1078fe7f01c458
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.ru/pify?keyword=que+es+un+trauma+psicologico+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and the wkhtmltopdf tool, suggesting it was generated programmatically to host these links.

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.ru/pify?keyword=que+es+un+trauma+psicologico+pdf In PDF document text
    • http://files.seattleknittersguild.org/uploads/1/3/2/6/132681823/gajakovojazekufo.pdfIn PDF document text
    • http://files.handymaninbristol.co.uk/uploads/1/3/2/8/132815207/d70311ea1b0278.pdfIn PDF document text
    • http://files.wow2007.com/uploads/1/3/2/8/132814933/6950442.pdfIn PDF document text
    • http://mexuku.hairbyemmac.net/uploads/1/3/1/4/131438177/de9c7f683e8d.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/1/0439/7072/3998/files/poderawijigubid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0923/5353/files/conversion_word_zamzar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6797/2515/files/comment_installer_les_cameras_de_surveillance_ip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4398/7357/files/sasogopagixip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/28272964561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/nodejs_read_file_line_by_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/66221650259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8402/files/captopril_mecanismo_de_ao.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/2006_honda_accord_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1889/5010/files/660583091.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_off00006893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6893 5536 bytes
SHA-256: 5c3ecd5da72d734208aa457147220570cb12233cf53dc71bc485d1b6d66635ab
font_01_sfnt_off00007b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4C 11124 bytes
SHA-256: 4cba94146c1f513ef8bd791fc3d088293df7c795c163c58606511061680210c7

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