Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4ffc251ed1a2cc…

MALICIOUS

PDF

44.4 KB Created: 2020-08-11 03:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 56beb6d0c3635a93ca0dac124214832d SHA-1: 6137b9f50b900e45d2db76b7d2ed66f89b0b29cd SHA-256: 9a4ffc251ed1a2cc40ed428bf31ec915d00d09e9cc697c0ca3b7a946ca946c40
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious objective. The document body, though heavily obfuscated, contains the text '7 day back pain cure book pdf' and the malicious URL, reinforcing the lure. No scripts were extracted from this sample.

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=7+day+back+pain+cure+book+pdf In PDF document text
    • http://korab.rockasmock.com/uploads/1/3/0/7/130775164/0585e.pdfIn PDF document text
    • http://files.danklandsaga.com/uploads/1/3/1/3/131381363/faab21.pdfIn PDF document text
    • http://files.miscellaneous-music.com/uploads/1/3/2/6/132682565/wevotozitaj-mibebulajupabiz.pdfIn PDF document text
    • http://files.fairysredcolordiet.com/uploads/1/3/0/7/130775998/6109670.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/1/0437/2480/0154/files/calendario_galvan_2020_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/73050411297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/lokefumatofase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/amenagement_du_territoire_au_mali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0995/0367/files/voxufafojuvudukupezeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7129/1035/files/tata_motors_aptitude_test_papers_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9911/2099/files/38140953576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7545/2569/files/81661053726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/gujatuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/7151325719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/sesuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/69907607729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/58198224091.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_off00006ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED4 5228 bytes
SHA-256: b625ac3a8a1748119b25ac9803409965571b8b91e462a9fab4b67ebc761e1b09
font_01_sfnt_off000080b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B0 10524 bytes
SHA-256: ea90e75227cfdbe9fd3a78e7a7a839b5ea99c74857980558b999a07f76d2b542

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