Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3af437d2e28dcf…

MALICIOUS

PDF

45.7 KB Created: 2020-08-02 08:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9a06eb684d5c34036835bb2bcf9f039a SHA-1: 15680b212542cfc7649d5fb2f4a6d53be140f374 SHA-256: 8b3af437d2e28dcf2e167d1c6a3c3a7366214ec048d705455f6399ba05f4f6e1
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 for containing malicious redirector links and a large number of external links, indicating a link farm. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=osrs+between+a+rock'. The document body contains garbled text but includes the same URLs, reinforcing the finding of a link farm designed to lead users to potentially harmful content.

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=osrs+between+a+rock In PDF document text
    • http://files.troop115.com/uploads/1/3/1/3/131384777/8468078.pdfIn PDF document text
    • http://files.jewelsofafrica.org/uploads/1/3/0/7/130775786/talabojinatilo_timexilogurago_sezoweduwuzo_jegiwusemuvu.pdfIn PDF document text
    • http://files.oliviaiannotti.com/uploads/1/3/1/3/131380210/5169071.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/1/0431/4886/9786/files/tejunawaxowawofojobexaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8687/9647/files/sinilezebatinofebavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/kaledazika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/26747642125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/45184944402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6805/3909/files/kikoditagojexovata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/onn_remote_codes_onb13av004_code_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/44539171624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/28983128779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5193/4108/files/31832858220.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 2

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_off00007673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7673 5084 bytes
SHA-256: a76d89d25d19edb3f22ac1b811ed9b406cb43c3e5c516bf9ddfe8b3f731d768a
font_01_sfnt_off000087df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DF 10164 bytes
SHA-256: ecce8656c340be212a22249ac298ea4a53adffb3874a12518e94da585fea1ad4

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