Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b737579e75716a6…

MALICIOUS

PDF

34.9 KB Created: 2020-08-12 18:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 123b312cdd6b462e49e7929fc70a76d6 SHA-1: c49c3082a9cdbf576c4e00c4ac8325e2e3bb208d SHA-256: 7b737579e75716a69b29bdffdfc47cfc31bf85a459c59ee774d91be48b000636
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=apostrophe+practice+pdf'. This indicates an attempt to direct users to malicious infrastructure, likely for phishing or malware delivery. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used to obscure the malicious destination. 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.ru/pify?keyword=apostrophe+practice+pdf In PDF document text
    • http://xuzij.proceng.co.uk/uploads/1/3/0/7/130740496/tobewi_dazaf_dalabinifetubo_pedamekanatem.pdfIn PDF document text
    • http://bigumof.kamiza.com/uploads/1/3/2/7/132710621/pesafop.pdfIn PDF document text
    • http://files.tomfosterclippers.com/uploads/1/3/1/4/131453541/novilorul-punok.pdfIn PDF document text
    • http://maroku.forlianofarm.com/uploads/1/3/0/8/130814297/jivutoxepukinux.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/1/0438/9827/3944/files/17729541969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7779/4982/files/programa_arquitectonico_restaurante.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/learning_php_the_hard_way.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/56553735199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66656561998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4440/4374/files/yoga_for_back_pain_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1910/7495/files/janusonumuruzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3152232763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/first_law_of_thermodynamics_experiment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/36863100500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6148/5471/files/95314539839.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_off00004b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B5A 5200 bytes
SHA-256: 5e338e84dcf07348dbc350d5c974d50dc906c4e8b642255e26bf83087fa6d8b1
font_01_sfnt_off00005d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D00 10032 bytes
SHA-256: e2271fce79355b2b915b6eb169ef43c3ae7009cef361fda176725a65b013ee79

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