Malicious PDF — malware analysis report

Static analysis result for SHA-256 835fc33c6155ddd1…

MALICIOUS

PDF

44.8 KB Created: 2020-08-21 08:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f577a39656f285273d126b7a6d44ec64 SHA-1: 9b18c587e2353c08f7d3158f2d541bbb7ab8dc52 SHA-256: 835fc33c6155ddd16b591ea2361b164be157796e28d50af7c5861b8f5af454e1
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=albion+labourers+guide'. The document body, though heavily obfuscated, contains text suggesting it is a guide, which is likely a lure to encourage clicks. 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=albion+labourers+guide In PDF document text
    • http://files.jbsjewels.org/uploads/1/3/2/3/132302718/sofudezupumagoba.pdfIn PDF document text
    • http://files.actwithpurpose.ca/uploads/1/3/1/8/131856121/tolazudofosasiruw.pdfIn PDF document text
    • http://files.winfielddesigns.net/uploads/1/3/0/9/130969740/zirowojuzef-wavukunitumo-zorizaxadeg.pdfIn PDF document text
    • http://files.nineonefiveapparel.com/uploads/1/3/1/4/131409761/tugezifopisij_garesa_bedigu_pezutemidemu.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/1/0435/3579/4327/files/91500845842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/lifubofufopadodil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/zikifunopazupid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/puborubisozimudon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9389/2008/files/basic_modern_calligraphy_alphabet_practice_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/77020409533.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9545/7941/files/bertolt_brecht_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/72353618990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2402/2680/files/wigosaduwuwafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1401/0518/files/85556712595.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 3

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_off00007346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7346 5120 bytes
SHA-256: f60714f38601bf4367d4859dd8110f7907feda8713417a83d99114e02e2d276d
font_01_sfnt_off000084ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AC 9948 bytes
SHA-256: 49b46bab9ce0b97936df62be6721bcd4b92af1f84924a4033816eea9311505c5

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