Malicious PDF — malware analysis report

Static analysis result for SHA-256 787f545c77ea86dc…

MALICIOUS

PDF

42.0 KB Created: 2020-08-21 00:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7832108af953ff07bab828b565c65d0e SHA-1: a00287676efe773c2cfde4cb663787a9adf7455c SHA-256: 787f545c77ea86dc896a9894762a40b32b00678595bfc2f075bc9450d661a8a3
194 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, primarily by linking to a known malicious redirector at 'https://ttraff.ru/pify?keyword=briony+fer+on+abstract+art+pdf'. The presence of numerous external PDF links, many hosted on Shopify, suggests an attempt to manipulate search engine results or create a link farm, potentially for phishing or malware distribution. The ML classifier strongly supports the malicious verdict.

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=briony+fer+on+abstract+art+pdf In PDF document text
    • http://xokeve.rockinghamlimo.com/uploads/1/3/0/7/130740178/4726791.pdfIn PDF document text
    • http://files.jeremywolin.com/uploads/1/3/1/4/131407227/9155308.pdfIn PDF document text
    • http://files.thespeechspacedc.com/uploads/1/3/0/7/130775655/mobuv.pdfIn PDF document text
    • http://files.velez.com/uploads/1/3/1/3/131398100/1500944.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/1/0431/0496/0676/files/46889047641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/motesif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/bluetooth_microphone_for_android_tablet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/11412095919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/12501074494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0133/0340/files/28318466973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/sowoderixediwurawasop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/python_import_from_directory_above.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7556/7770/files/kizugiwejabuwima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9471/9131/files/3dmark_11_physics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/21506670784.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_off00006724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6724 5408 bytes
SHA-256: 47d1cff3d0a2c5f45ed6b4d5245f26994953a3f322712d483cac50ee71345d43
font_01_sfnt_off00007993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7993 9876 bytes
SHA-256: bdf5126e18cfd9f6a5594d0a260f8c4e09d9b8ae351f3b39611e88ad45f86f5b

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