Malicious PDF — malware analysis report

Static analysis result for SHA-256 874f8b5a21487457…

MALICIOUS

PDF

49.6 KB Created: 2020-08-03 20:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f1738c5668af64e1b9a7cdeab8dec35 SHA-1: 64724803298e42cb3f6d052a6c972a28cf1cda10 SHA-256: 874f8b5a2148745724d650f8c3a7d498d34319b6c8a1f54d99bf39f1581a4f0d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a specific redirector URL, 'https://ttraff.cc/pify?keyword=creo+parametric+4.+0+book+pdf+free+download', which is flagged as malicious. This suggests a phishing or malware distribution attempt, likely using the lure of a free software book download to entice users to click the malicious link. The ML classifier also strongly indicated maliciousness.

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=creo+parametric+4.+0+book+pdf+free+download In PDF document text
    • http://files.tombellfire.com/uploads/1/3/1/4/131452872/1386159.pdfIn PDF document text
    • http://files.uktravelhacking.com/uploads/1/3/0/9/130969390/pidogaba_jesogolapito.pdfIn PDF document text
    • http://files.andreapoe.net/uploads/1/3/1/4/131453429/zibinivu-womele-tajusenurise-gobikitife.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/1/0429/3178/1791/files/68226844814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/49316055263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/40432408832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/jagumowiwonamikut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/download_spanish_books_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/wesinexobupimefegubakafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/27290919899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/9260574754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/jazipesemolib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7234/6526/files/zosusirenexojasinabezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/lubufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/57388296384.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 4

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_off00008157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8157 5584 bytes
SHA-256: 331369c62c15150a6d9b3942d976e99c8e3ef39e8353d2bb504393142facc9dd
font_01_sfnt_off00009454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9454 10708 bytes
SHA-256: 9c7bacfc4d5ad1e0af4f202e98122bdad4f8fbe14bc6ca3e64540dbe25977edb

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