Malicious PDF — malware analysis report

Static analysis result for SHA-256 8756804a6561fa89…

MALICIOUS

PDF

38.8 KB Created: 2020-08-16 23:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cd86bb76ab0d399c19363c0d0985e28a SHA-1: c86effcb98393c5cbf432cdb96ab6aaeef6e6ca9 SHA-256: 8756804a6561fa8901e4a86a2e7300cd56da42105f1bd1a5500c9645bfcae2fd
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious infrastructure. The embedded URLs, particularly the one leading to 'ttraff.cc', are flagged as malicious redirectors. The document body, though heavily obfuscated, contains the same redirector URL and other URLs that appear to be part of a link farm, likely to obscure the malicious intent and evade detection.

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=spelling+numbers+out+worksheet In PDF document text
    • http://files.legacyhorselogging.com/uploads/1/3/1/6/131636990/rakofidi-tuxujojaxeki.pdfIn PDF document text
    • http://jarusi.lastwatchhorology.com/uploads/1/3/1/6/131606346/ee5731e5f666d.pdfIn PDF document text
    • http://files.bestpickeddiets.com/uploads/1/3/1/6/131606465/1a697.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/1/0441/2728/9496/files/63670980213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9073/0405/files/4958631902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/29978673134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/63734671727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/96232701117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3269/9295/files/the_iliad_lombardo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1782/1605/files/67599496972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7409/2198/files/saxalutamaziwasopikilet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/pozexuzuxizuxalaxowopu.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_off00005991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5991 5424 bytes
SHA-256: 787450be53a6b45e2c66ca44d394830ada850000dae824cdc39dfe64c14bd82b
font_01_sfnt_off00006be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE6 10100 bytes
SHA-256: 6249dd14959fb6840d281b4501447a47345b1ce2183dd5bb92469cb4bf05cc7d

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