Malicious PDF — malware analysis report

Static analysis result for SHA-256 390c11341f519f44…

MALICIOUS

PDF

40.4 KB Created: 2020-08-20 14:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 836ea3da4d89af5ce987ebb82769d5d8 SHA-1: 3af6ac4844a489578e7b5152bf6238281aa5aa31 SHA-256: 390c11341f519f44d9e9b8de493442209f8dd97a3e42071eb8f80d64636fc626
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to a malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the target URL and other PDF links, suggesting a social engineering lure. The primary goal appears to be redirecting the user to malicious infrastructure.

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=groundwater+flow+modelling+guideline In PDF document text
    • http://files.yogibjewelry.com/uploads/1/3/1/4/131483955/puwitiwisurom-wibofunux.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/1/0429/1110/5183/files/axillary_artery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6348/4315/files/79084843160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7182/6072/files/lojugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1500/7390/files/bhagavad_gita_sanskrit_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/xemozajorezobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/zikadejojukefaruva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/mowazinekonopos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/ergonomics_hazards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/david_klein_organic_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/43319119670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6075/4582/files/denebuxinulesafetakimuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/insurgency_modern_infantry_combat.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 1

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_off0000616c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616C 5172 bytes
SHA-256: 951ce106a9eef6aaeed9fa35354f48a9af690bc185bd405a6173de05ea0db616
font_01_sfnt_off00007309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7309 9916 bytes
SHA-256: 5d633ed852023a4debb5221adea8cd1ee4d4955b4d21e69b6b47565ecfbba0d9

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