Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c100ae0ca8f386…

MALICIOUS

PDF

66.7 KB Created: 2020-08-28 11:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cff260ea27b1a199df7a22ee174d9ce3 SHA-1: 6f9c3b8fae1bd5247f7fbe47def94acd68ed2df4 SHA-256: 73c100ae0ca8f386c8d7389c059398dc733dbb23a479445b867b7ce75c1aa07e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary purpose is to redirect users to potentially harmful content, likely a phishing or malware distribution site.

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=harold+robbins+pdf+pirata In PDF document text
    • http://kerukoru.tuningintowellness.com/uploads/1/3/1/4/131437792/6431923.pdfIn PDF document text
    • http://files.prydgymnastics.com/uploads/1/3/1/3/131383838/2626253.pdfIn PDF document text
    • http://voduko.turtlecreekjc.com/uploads/1/3/1/1/131164250/1f21164.pdfIn PDF document text
    • http://zuveso.pavlinkoproshops.net/uploads/1/3/1/3/131379510/72cdcf56c3.pdfIn PDF document text
    • http://galego.foxpool.com/uploads/1/3/2/8/132814930/mevadi.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/1/0438/4283/0496/files/alliteration_worksheets_1st_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4956/6876/files/fanelewivuwomepizogeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/weather_report_new_delhi_today.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1092/2392/files/mudakap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/lagu_cinta_luar_biasa_dj_andmesh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8307/0629/files/64360332386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8476/6620/files/34654634794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/25553087390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/bafesoroxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/76059824183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/juwakovulexure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/90678893116.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 3

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_off0000c831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC831 5136 bytes
SHA-256: 614029510dad2d771a148d2380b7087074ba6604a00aca34b736b3a57fadfddf
font_01_sfnt_off0000d9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A9 10548 bytes
SHA-256: eb9a597fd0b181c0ec468aa5b147c0b268a2a8c943997fde5cef4d8785b4cc40

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