Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4642ab009050655…

MALICIOUS

PDF

42.2 KB Created: 2020-08-26 13:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae6a00ead71c456fa29dce4c84f9affe SHA-1: 4442435220e3d5d17aaaea31a7472171b0291ebe SHA-256: a4642ab00905065532b3a178f3832c2e04c74e71b6d8f286afdc08dbd79c7973
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=slipknot+the+gray+chapter+torrent'. This indicates the document's primary purpose is to redirect users to potentially harmful content, likely a phishing or malware distribution site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm SEO tactic to improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=slipknot+the+gray+chapter+torrent In PDF document text
    • http://files.dahammaak2k.com/uploads/1/3/1/4/131409442/237179.pdfIn PDF document text
    • http://mejiveka.kaoscup.com/uploads/1/3/1/6/131637814/mosoxinapujex_diteluwewikajo_lusanugo.pdfIn PDF document text
    • http://files.katycupcakes.com/uploads/1/3/1/4/131483249/suparumesimozoji.pdfIn PDF document text
    • http://fiter.texasredbuddental.com/uploads/1/3/1/4/131453206/7791007.pdfIn PDF document text
    • http://files.liberationgifts.com/uploads/1/3/0/8/130874655/fepupekubevage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/81187085438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0496/8603/files/damixerodezama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/4215500519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/cycle_se_dj_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5767/6193/files/rofofaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/nabuvatonirisenis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/17885682133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/0799/2998/files/zalora_apk_latest.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58CE 5072 bytes
SHA-256: bba65eb2a4854f0e55f300dac5e4924cdf52014948ed599648600f4610ee9829
font_01_sfnt_off00006a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A06 10456 bytes
SHA-256: bb627d2c59c074c452d239a369828f5cc8e4eb0d02afbefe3e57e33a8f92521b
font_02_sfnt_off00008dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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