Malicious PDF — malware analysis report

Static analysis result for SHA-256 75caf3e5eab1d016…

MALICIOUS

PDF

37.9 KB Created: 2020-09-15 19:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d7324d314ab1b95a0581849b5de832df SHA-1: 2cb1cbe15ed8ec0d392e8ac4b171fd84f3d97260 SHA-256: 75caf3e5eab1d016348a46ef643993ae0d1bff22b2b4ccc2ea74c2dcbf0d259e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure designed to lead users to malicious content. The heuristic firings indicate the PDF is a redirector and part of a link farm, suggesting a phishing or scam attempt. 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.club/pify?keyword=the+clique+online+pdf In PDF document text
    • http://zuguzonem.mohamedalkhoori.com/uploads/1/3/2/7/132740214/dajat.pdfIn PDF document text
    • http://rulefife.caitlin-cannon.com/uploads/1/3/0/8/130874368/735b392217b3.pdfIn PDF document text
    • http://files.bahatiteacompany.com/uploads/1/3/1/8/131858540/woguxunimuru.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/1/0434/0344/4380/files/best_free_text_to_speech_reader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/blizzard_app_slow.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/121e37_88b939013dfa480db9e09c2c1feb7011.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b30cf0_ccd577c0eb52471fa863c726a7057b59.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/18f527_01cda4156d0b48bebb4962a67b6200e6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ab922d_518383e459054c41a1559af726cbf71d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9904c2_1a18f5fff61e461e897d654929fe7830.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9421c8_c14dd796b368423384d977f430647ce6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e33828_435c9dc6e5534e8f85fc2fcc0f0545ec.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_off000048ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48CE 4636 bytes
SHA-256: a23efbd363eebaa3131d71074d9f84dcbbc59d49b2c0505233e314677295008b
font_01_sfnt_off00005878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5878 10820 bytes
SHA-256: 8151fb7e166a10077244bd1a8def22c4dfea5ea032f56a2c0435c51a69b03bd5
font_02_sfnt_off00007d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D19 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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