Malicious PDF — malware analysis report

Static analysis result for SHA-256 b94274946630b007…

MALICIOUS

PDF

39.2 KB Created: 2020-08-12 16:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d86b7e8692e96bdce28e0f2fce77b4b5 SHA-1: a7575b2230b45b489602f682434d799ef98bd4d8 SHA-256: b94274946630b007b7c743428a537161421cb6232c7714a8252e1a8ae23b195a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with one prominent link directing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, 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.com/pify?keyword=calf+tear+exercises+pdf In PDF document text
    • http://files.theloosethreadsquilters.org/uploads/1/3/0/7/130775310/pagevefimaw.pdfIn PDF document text
    • http://files.koppelmun.com/uploads/1/3/0/7/130775342/6471206.pdfIn PDF document text
    • http://files.bluelotusbeadwork.com/uploads/1/3/2/8/132816195/nemidi_zovikiwidezor_fizoxa_talejakif.pdfIn PDF document text
    • http://files.keithalman.com/uploads/1/3/1/3/131383325/nusevume.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/1/0430/9568/7328/files/91276722172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1400/3610/files/fixebokisapavipoviso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1151/0170/files/addition_and_subtraction_decimals_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6667/0745/files/employees_state_insurance_regulations_1950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/mapa_cercanas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41697505155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8219/4847/files/low_cholesterol_diet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5961/7690/files/38805043973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8962/3208/files/47264371985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/17631116110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2977/3979/files/salowurujakopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/79564303850.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDA 5124 bytes
SHA-256: 43a8ce52b87a64708d92d77bdaff3a738b7f7428a12219c3d2e3c45a80652471
font_01_sfnt_off00006f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F54 9592 bytes
SHA-256: fcb6c23bbba71d757603330ee643bc7c43883f40896523b41ff8c204a517784f

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