Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c8df102441854c…

MALICIOUS

PDF

51.0 KB Created: 2020-08-07 08:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1c6dc55a38b6752ea8c86a369c1f7f91 SHA-1: 48bca39bac972faa91f8b31a28446b7ffc4f68e0 SHA-256: a8c8df102441854ccfa0253d3f37d45af5e9b44ca7468c328bb55d2c2be4bd45
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as search engine results, with one prominent link leading to a known malicious redirector at 'https://ttraff.ru/pify?keyword=autocad+commands+3d+pdf'. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to download further malicious content. The ML classifier strongly supports the malicious verdict.

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=autocad+commands+3d+pdf In PDF document text
    • http://files.vonboeck.com/uploads/1/3/1/0/131070202/fa804f051066d00.pdfIn PDF document text
    • http://files.xofitnessstudio.com/uploads/1/3/1/3/131383648/0c6d0c493fd3d8.pdfIn PDF document text
    • http://files.cattailacres.com/uploads/1/3/2/3/132302998/5081388.pdfIn PDF document text
    • http://files.5ivezero.com/uploads/1/3/1/4/131437538/boxuzuzege-jamov-susaxozokusonir.pdfIn PDF document text
    • http://files.urgasconouranimalshelter.org/uploads/1/3/2/6/132696145/1296695.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/1/0437/7382/1082/files/11428039203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/17341358685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6663/0037/files/75354380399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/jawosofemetov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9175/3115/files/balanceamento_quimico_9_ano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/powewarowuwejitibam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/84378336986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/37198097568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/47940662552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/80549044023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8939/3816/files/vocabulary_meaning_in_marathi.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_off00007f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F33 5328 bytes
SHA-256: 0c010d20fff51fb186cb301bc6f67fae5407a7767d554dfe9086412ce7bc96c0
font_01_sfnt_off0000914c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x914C 14964 bytes
SHA-256: b560ddebbe798432e7fb257672effcd3403b6f45f4fbf73e5130187adcf0bee9

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