Malicious PDF — malware analysis report

Static analysis result for SHA-256 808561521a977b1c…

MALICIOUS

PDF

52.8 KB Created: 2020-08-23 23:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7be1e1483ff0ef503e176b0a6db57992 SHA-1: e3ccf45974eb32fa2d5ef31e93dac0c1fcbee83b SHA-256: 808561521a977b1cd8e80fa976fb03102c7b729efd53e3aaa36d068369e4cc7e
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt disguised as content. The ML classifier strongly flagged this PDF as malicious. The embedded URLs, particularly the redirector at 'https://ttraff.cc/pify?keyword=assamese+bihu+songs+junbai+2008', are likely used to lead the user to a malicious site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.cc/pify?keyword=assamese+bihu+songs+junbai+2008 In PDF document text
    • http://rivatim.mhsbritish.com/uploads/1/3/1/1/131164100/63bf52.pdfIn PDF document text
    • http://xikinu.ciedualk.com/uploads/1/3/0/8/130874063/5263479.pdfIn PDF document text
    • http://files.monsterboylives.com/uploads/1/3/1/3/131398250/3702545.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/1/0432/0506/6913/files/93884861817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5982/0182/files/faithful_texture_pack_1._8_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6437/7752/files/35327411629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/birumimemofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/sosivoromiril.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/9984/4762/files/nisemerikifato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6107/6375/files/tebeketozoda.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 5

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_off0000817a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817A 5644 bytes
SHA-256: 295ecde76ca5e3ab713419d216ad105669b72dbfbfe5bf2b32446d9c482a1694
font_01_sfnt_off00009488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9488 15812 bytes
SHA-256: a2b2b47494085a08dbbae03d7ee798c23c5439b74f86d13d6e3a3b4cdeb99feb

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