Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3f6aa44ad68ea1…

MALICIOUS

PDF

41.3 KB Created: 2020-08-20 09:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7066694492f577a2ff7da578241b8aa2 SHA-1: 73bc0b07a8984d9d1ed4221de6c710640bc1e72f SHA-256: 5b3f6aa44ad68ea1e75c38aa650f79fa5bd8b516bac39fb00449be6c6968eced
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) and a large number of SEO-optimized PDF files hosted on Shopify. This suggests a link farm or phishing campaign designed to drive traffic to potentially malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a social engineering attack.

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=excel+concatenate+two+sheets In PDF document text
    • http://files.sischoolsf.com/uploads/1/3/1/4/131437446/4728780.pdfIn PDF document text
    • http://files.insurancenewsmyrna.com/uploads/1/3/2/3/132302749/60191d3d5c1.pdfIn PDF document text
    • http://files.carolynhart.com/uploads/1/3/0/9/130969801/5431501.pdfIn PDF document text
    • http://files.jacquelinestanford.com/uploads/1/3/0/7/130775635/gigogeziviruti.pdfIn PDF document text
    • http://files.massageandfacialorganics.com/uploads/1/3/0/7/130775484/gudadawino.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/1/0440/2210/4229/files/84674534608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68769425665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5769/0262/files/56823078335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7455/0950/files/limit_decimal_places_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/xedipavidudixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/bollywood_5._1_mkv_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/68940399151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1760/7067/files/turk_film_torrentleri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6209/9109/files/temupumibuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7250/files/rezeb.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 7

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_off00006553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6553 4908 bytes
SHA-256: 780e018bab9eb401a9c74bb2dc4abcff7fb4a8a800ab090c9fd0980298044969
font_01_sfnt_off0000760e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760E 9948 bytes
SHA-256: b4baebb4972f6635e8beee55a4c79205aa4a53b72cdd5cce01f6b6cffcd10569

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