Malicious PDF — malware analysis report

Static analysis result for SHA-256 8305354f6b07b7ef…

MALICIOUS

PDF

49.7 KB Created: 2020-08-22 22:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1ab7c68fc3cd89b3c9cd1d84a61451f SHA-1: 20011da1e9b82710971dfb298ce84c80ebcc01a1 SHA-256: 8305354f6b07b7ef830bdf19f03a5c965e401509b912e3142a1389fc748f65b4
134 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector, specifically linking to an SEO-based phishing lure. The embedded document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=android+mobile+recovery+apk', which is presented as a download for an 'Android mobile recovery apk'. This suggests the document's purpose is to trick users into downloading potentially harmful software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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=android+mobile+recovery+apk In PDF document text
    • http://files.ethos-amcww.org/uploads/1/3/1/6/131606550/venawipudato.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/1/0428/6827/7404/files/sefevapijevomegepibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9255/7462/files/97860158045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/gupubobubufeduxofuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1975/3879/files/define_collective_bargaining_agreement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2829/9428/files/jegegabivufovadijugokoron.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6847/9906/files/ielts_reading_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6165/files/kirejuregufabemavewekos.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 2

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_off00007932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7932 5396 bytes
SHA-256: d6519bba7e918f2fce1d73b5325a85e418a00a2b446fcc2804d82e50cad3fb7a
font_01_sfnt_off00008b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B77 14920 bytes
SHA-256: 5e0190b2bba05820f7e2821e65ae33d11ba21345cfc36020a3de40431601bfcc

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