Malicious PDF — malware analysis report

Static analysis result for SHA-256 8593dcf6b4d42644…

MALICIOUS

PDF

43.3 KB Created: 2020-08-10 10:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d8ee018459cbb929d97c7eb7ec8502a SHA-1: c09e5d7de05b4ec8c3e473d9f8bc9491096412b0 SHA-256: 8593dcf6b4d42644025bed9b13e9ce2d98af2adf4bcfb3b8cee7b06c85c90d57
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF filename, suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

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=north+west+construction+hub+pdf In PDF document text
    • http://files.myoptique2020.com/uploads/1/3/2/6/132695741/zudug.pdfIn PDF document text
    • http://files.implicitbiascleanse.com/uploads/1/3/1/4/131406841/vamematonepod.pdfIn PDF document text
    • http://files.threemendousfilms.com/uploads/1/3/1/8/131857679/fodotife-resot-kegizopanujufir-dezifoxagiz.pdfIn PDF document text
    • http://files.catch90.com/uploads/1/3/0/8/130873769/9814833.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/1/0434/7750/0056/files/bluestacks_ad_skipper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7652/3934/files/12887183629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4413/3281/files/36170969254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/bluedio_t2_turbine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/neditokovowiturusumumese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46391305542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/32433121922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3923/5989/files/bayesian_reasoning_and_machine_learning_barber.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9468/8419/files/administrative_law_in_nigeria_noun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5865/1545/files/43194244258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0153/4875/files/59167574377.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_off00006c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C61 5200 bytes
SHA-256: b59ad90814040ccbe1cde5b64d521fecefa6cb104bb28a7c4aaaa99d070d2f7a
font_01_sfnt_off00007e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E23 9992 bytes
SHA-256: f7c0bda65a6e943b11bed941fba9791f1221ab27e1d4c361c8e7350ad763a5fd

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