Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb860c37a0d1574…

MALICIOUS

PDF

40.5 KB Created: 2020-08-22 22:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6b5ed4b35b274d942f6830ae8b42849a SHA-1: e2c7b0b9b2a9b407ec46c1d3018017dddaf36148 SHA-256: abb860c37a0d15744079285c84d6b49addf2b06bee970f826dcad3b471f9b4a5
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to ttraff.ru, disguised as academic resources. This indicates a phishing or scam attempt to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL and other PDF-related metadata, further supporting the attack pattern.

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=academic+writing+for+graduate+students+pdf In PDF document text
    • http://files.carlyhaecktherapy.com/uploads/1/3/1/1/131164009/fosawaperodegamop.pdfIn PDF document text
    • http://gividera.zenprovcomedy.com/uploads/1/3/1/3/131380213/3149299.pdfIn PDF document text
    • http://files.kaipumakanichc.org/uploads/1/3/1/4/131455141/warovamoloxuzitadet.pdfIn PDF document text
    • http://files.timelessvaca.com/uploads/1/3/0/7/130740465/ceb0feb31c940c.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/1/0451/1835/7669/files/engineering_drawing_textbook_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/magento_2_theme_development_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/clinical_anatomy_of_lower_limb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4524/8421/files/31757773192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wurawosupamajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/campbell_biology_10th_edition_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5415/4406/files/whatsapp_for_android_2._3_6_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5917/3784/files/98460556904.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_off00006075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6075 5524 bytes
SHA-256: 77f58287a9ed1a075a31ccfd2403b98c4d61a4ec562d59e8bdbb4c3546cd21e4
font_01_sfnt_off00007338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7338 9920 bytes
SHA-256: ad0808ac9f62c1fd649a22ac57f421a165f003c1d565dca0b9c794c5c4303eec

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