Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a94f32df84fb7c…

MALICIOUS

PDF

42.9 KB Created: 2020-08-13 22:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d6399f9ac33715bd3b9992265f130374 SHA-1: d59816db308346dd4b1e73a56a0863b1a472cd9c SHA-256: 79a94f32df84fb7cba433497eaf22f3fec3469bff2a516e89d812336bbb80043
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking title, suggesting a lure for users to click the malicious link. 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/wb?keyword=letter%20tracing%20worksheets%20a-z In PDF document text
    • http://files.boktouchforhealth.com/uploads/1/3/0/7/130738696/6616500.pdfIn PDF document text
    • http://files.counsellingpsychologist.services/uploads/1/3/0/9/130969555/7582248.pdfIn PDF document text
    • http://wepej.road-savers.com/uploads/1/3/2/3/132303382/demobibuxonafawe.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/1/0431/4116/9303/files/dugonukilubareximip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2529/1674/files/999650659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/wings_of_fire_ebook_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2407/2349/files/cartea_ugly_love.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/12329367793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/88240408463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4128/1432/files/visa_bulletin_2016_predictions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9958/4664/files/41609956510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0106/9220/files/zomubidinazekebog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7618/8315/files/tinkers_construct_arrow_modifiers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/9872306347.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 8

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_off000068cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CB 5208 bytes
SHA-256: 203c82006076918c5f9c3dd9dadf71963d3500dc5c95966817d6dd5e8cae9dfd
font_01_sfnt_off00007aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA7 10428 bytes
SHA-256: bea922fe4b077d203b2179816c6296386606c0e793e052d12ed8fca8da2aee17

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