Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a842e576a4fa73…

MALICIOUS

PDF

37.5 KB Created: 2020-08-03 00:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 792ba3a094755c2c1d3b02928df85c35 SHA-1: 3b6e072aaa6770a8f351bb4b429e9b8f8138c3d3 SHA-256: 86a842e576a4fa7359044ffe88b7285e7b24c27b48e0335aa9a07a03eb17a109
194 Risk Score

Malware Insights

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

This PDF file contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm designed for SEO manipulation. The embedded URLs, particularly the one pointing to 'ttraff.ru', are flagged as malicious redirectors. The document body, though heavily obfuscated, contains references to these URLs, suggesting a phishing or malware distribution lure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/pify?keyword=mcmlxxii+roman+numerals In PDF document text
    • http://files.chrisjsilvaportfolio.com/uploads/1/3/1/4/131453024/fidifutifofute_bubol.pdfIn PDF document text
    • http://files.ledgewoodhills.net/uploads/1/3/1/4/131407152/85b3f4c0.pdfIn PDF document text
    • http://files.watertownctrecreation.com/uploads/1/3/1/4/131407315/tuxujusirini-jafimav-weninebozasokum.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/1/0428/1224/4134/files/92891889523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/62688134969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/19050225017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/4_gigabytes_to_megabytes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/49974759452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2517/0595/files/pasazileraguwazunosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/yardi_voyager_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1932/7896/files/11801609131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/nesatodarufovosamad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5653/7495/files/2961785184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5196/6873/files/69328215566.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
🗂 Part of campaign: chrisjsilvaportfolio.com 3 samples

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_off000054b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54B0 5016 bytes
SHA-256: 231a8c7b44da846690b2fdd5804b616ed28381f08699e940518faaeec303b936
font_01_sfnt_off000065b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B0 10960 bytes
SHA-256: 4dedbdf983a7d705ecdb50f3a4f9ef670c56018190aef4e3a9dc75c0f8f4048c

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