Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a79b56a13a0bacc…

MALICIOUS

PDF

44.8 KB Created: 2020-08-12 22:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bfbde993779cee58b1512bf5f95c76b3 SHA-1: e4fa91f8184597e739878bc9e6fe277236bdf1d5 SHA-256: 5a79b56a13a0baccc39eacae04474442c52716b114dd0afe7c39d4fbc3345c9a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm designed to attract search engine traffic. This suggests a phishing or scam attempt where users are directed to malicious sites.

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.ru/wb?keyword=trumpet%20voluntary%20clarke%20pdf In PDF document text
    • http://files.companychowfoodjunkies.net/uploads/1/3/1/4/131437733/1c81aba.pdfIn PDF document text
    • http://bufuvex.herveybayorchidsociety.com/uploads/1/3/0/7/130776167/wonor.pdfIn PDF document text
    • http://vemarita.lorrainepearl.com/uploads/1/3/0/8/130874359/5409363.pdfIn PDF document text
    • http://files.questgolfacademy.co.uk/uploads/1/3/1/6/131636828/megujox.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/1/0431/0056/9753/files/wefinezapatexumex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/60124118170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/periodic_table_of_elements_list_with_atomic_mass.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/63801471361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4743/files/situlowabetelotamam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6127/9896/files/woridovavadawut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/black_hole_sun_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0084/5720/files/70533840920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/78416307521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/82000447829.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 5

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_off000071d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D9 5296 bytes
SHA-256: 7fbe12db0b99b742d78ee49279b45890d2899a7564ee877d82d5d2eea2dfa9a9
font_01_sfnt_off000083d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D5 10112 bytes
SHA-256: e7efbe5c7fe5bd7cee19930b8ad709de87987cf6e3924e8062fb3ac6b84810a6

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