Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ab4a0680143fce…

MALICIOUS

PDF

32.2 KB Created: 2020-08-23 10:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6dd43fe925b981208d9c92eb2e643f70 SHA-1: 4f79369e4e11e9812c2691774d2fa6f2dc1ddc87 SHA-256: 77ab4a0680143fce09cc167bd00a96e8c654189bcae071a6034b42d2f2c79464
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to improve search engine ranking for malicious sites. 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.cc/pify?keyword=forcepoint+dlp+administration+guide In PDF document text
    • http://files.rabbitrailsupply.com/uploads/1/3/1/3/131398143/7846719.pdfIn PDF document text
    • http://retevabik.aggielions.org/uploads/1/3/1/8/131857054/zizejaribefoninen.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/1/0433/7342/8888/files/bazuduz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/kenmore_washer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3891/4213/files/introduction_to_aquatic_toxicology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/xigowoxofupesewon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/pimeguvugedadubomoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6332/7385/files/66341483010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuketunaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/advanced_after_effects_tutorials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/47431419686.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 4

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_off0000426d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x426D 5348 bytes
SHA-256: 9be4c66a365c3effa6e1e1beab26d179f9ebfba9dbe7afe87781e5d2a4d9a38e
font_01_sfnt_off0000547c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x547C 9260 bytes
SHA-256: fee4d0ae05a69856d4f17299104783c28cfe1ac3ae776988db86a04c873b96cf

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