Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12a03791b828560…

MALICIOUS

PDF

35.7 KB Created: 2020-08-19 23:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: afda8dfd2df0548593fa4530dcfdbaa5 SHA-1: 63cdd3f9d3cb41ac0e79efec61c95952475430be SHA-256: b12a03791b828560478b6e614fe56678316df05bd4ad70506ef9db25f73e31c6
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The embedded URLs, particularly the one pointing to 'ttraff.ru', are associated with known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to this malicious URL and other URLs that appear to be part of a link farm, suggesting a social engineering lure to drive traffic to malicious sites.

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=chinkara+kinnaram+remix In PDF document text
    • http://files.monavalehospitalauxiliary.org/uploads/1/3/0/7/130738501/xivudaperesave.pdfIn PDF document text
    • http://files.thehumanempathyproject.com/uploads/1/3/1/3/131381602/degupufomakemaj.pdfIn PDF document text
    • http://naruwagu.artisantimberworks.com/uploads/1/3/1/0/131070934/kurepat.pdfIn PDF document text
    • http://files.vivwalkerart.com/uploads/1/3/1/4/131453256/xililotufemofebi.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/1/0430/6888/3106/files/male_reproductive_system_labeling_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5032/0540/files/cardiovascular_risk_factors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/92105199531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/54934895253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3540/7014/files/coefficient_of_correlation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/kakerilavazenigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6527/7605/files/78148660000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/bailey_and_love_surgery_google_drive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5218/7298/files/physical_science_grade_11_study_guides_caps.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 6

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_off00004786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4786 4752 bytes
SHA-256: c3537f3559764dd7586934fdf22106f6c5e6af1793f3b9c6e27acb52f30b1563
font_01_sfnt_off00005778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5778 13692 bytes
SHA-256: ecb1266c8bec3596e93a558db660bdfe47b8a8902665be7eb3b9e1801ffbfa1e

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