Malicious PDF — malware analysis report

Static analysis result for SHA-256 0091dc2091c7d857…

MALICIOUS

PDF

67.8 KB Created: 2020-07-30 15:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f1ae317e71e5e7ee29c9873deed81a15 SHA-1: 57c2e7ac1fa03439920f521b67379350d39880f0 SHA-256: 0091dc2091c7d857412bc64d6a10052163ac848bef5e5f51619177fe70251ca4
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDFs, many of which are hosted on Shopify and appear to be part of an SEO link farm designed to attract users searching for specific documents. The primary redirector URL, https://ttraff.ru/pify?keyword=amsterdam+rail+map+pdf, is flagged as malicious and is used in conjunction with an image lure. The ML classifier also strongly indicated maliciousness.

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=amsterdam+rail+map+pdf In PDF document text
    • http://files.commonplacebooksftw.com/uploads/1/3/0/8/130813644/7589179.pdfIn PDF document text
    • http://files.blueseabirdclaydesigns.com/uploads/1/3/1/3/131383456/mumewujototeka.pdfIn PDF document text
    • http://files.billhoganphotography.com/uploads/1/3/0/8/130874627/9332220.pdfIn PDF document text
    • http://files.stohrdesign.com/uploads/1/3/0/7/130739552/8112872.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/1/0429/6635/2025/files/baxogutimisunoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/juzufixilobowomisewuduf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6762/8950/files/98977672137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/25359249976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1635/4977/files/rederixulesodamavaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0445/9168/files/79518182435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/dekuwejofodezapujiwomid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/wetewuguxejeridovenuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/16074545646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/zagenaxijadenewidusodat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/69174792628.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEA 4748 bytes
SHA-256: bb84e762a40711033c8e8f0af02023a4eb412d7940e67efcf4f844e9c09d3caf
font_01_sfnt_off0000dcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFF 10848 bytes
SHA-256: 35c7f75829653bfb92e4475d995493668952e6aa6c9f5dc83625c84b0a692f87