Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b3a6cc6febdb23e…

MALICIOUS

PDF

41.5 KB Created: 2020-08-11 04:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e0b800e3567dd608abf68558063466c2 SHA-1: 6bd66e186014ee5385a1901724adf30b03d7a7ea SHA-256: 7b3a6cc6febdb23ec6feb7ef290c4f293bd196defef10c6224d6dc794d48823c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with a primary redirector URL identified as malicious. The heuristic firings indicate that this PDF is part of a link farm designed to redirect users to potentially harmful content. The ML classifier strongly supports the malicious nature of this sample.

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.com/pify?keyword=calculating+percentage+composition+pdf In PDF document text
    • http://files.kccreekranchevents.com/uploads/1/3/0/7/130738741/3367aeb.pdfIn PDF document text
    • http://files.bellevernonbands.org/uploads/1/3/0/7/130739415/0c730a863485.pdfIn PDF document text
    • http://files.abaofwisconsin.org/uploads/1/3/0/7/130739059/3659241.pdfIn PDF document text
    • http://lenima.sustainabilitysuperheroes.org/uploads/1/3/1/3/131380429/7319790.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/1/0431/6296/0023/files/zupakafodebilimikiriwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7383/0040/files/bihar_tourist_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9257/8208/files/bookkeeping_and_accounting_all_in_one_for_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/dodotolitur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/zejedawatitatidod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/va_form_10-_8678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/85958883478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/68054945022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4610/0377/files/65294398384.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_off000063d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 5380 bytes
SHA-256: e3b7e3e187fda9165bb7bc117fc9346925a67bacc105b6b4e4ad129dea4ab2ec
font_01_sfnt_off000075ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FF 10372 bytes
SHA-256: 640dee276a1df6010734c12c5a928c5b39b7b5554c96fe8b67a2e4efefedee88

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