Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d20d624282cd3e…

MALICIOUS

PDF

37.1 KB Created: 2020-08-04 03:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41bceb898c50f84541b5687b57c12a93 SHA-1: 03fb0e64de29ea676f2a57c51ed6701341fc5f9e SHA-256: a8d20d624282cd3ecfeecd2dcac777db9ecd60954d099ed7d0aa9676e1d0473a
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=automatic+writing+machine+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF link, suggesting a lure to external content. The primary intent appears to be redirecting the user to malicious infrastructure.

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=automatic+writing+machine+pdf In PDF document text
    • http://files.battambangparish.org/uploads/1/3/2/6/132681002/d767baf407e6.pdfIn PDF document text
    • http://files.sascelledesigns.com/uploads/1/3/1/8/131857818/bobaravizidawu.pdfIn PDF document text
    • http://files.artz-rva.com/uploads/1/3/1/4/131453982/bbbfb0.pdfIn PDF document text
    • http://files.ollrichva.org/uploads/1/3/1/6/131606672/7006847.pdfIn PDF document text
    • http://files.shesthefirstwisconsin.org/uploads/1/3/2/7/132712006/dapuvizupedana.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/1/0428/9173/9295/files/kurejugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/20630043483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/demutejinepijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1654/2632/files/daxonoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/vugopavak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/45210763805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8266/1532/files/gifubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/taramekusesevafiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/javapurinotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/49011928916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/liwitijasagebikukak.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_off0000530b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x530B 5440 bytes
SHA-256: 1bc5e2151128970fb5b39bf5de754f30d80154ab1033b192e5b599d75d46e628
font_01_sfnt_off00006570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6570 10172 bytes
SHA-256: 7e187229e1059d0d9e4eeb625886c2e7f6bd8e363d174e3db959da64e8020b50

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