Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33b266e7e5abd09…

MALICIOUS

PDF

67.1 KB Created: 2020-08-09 08:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ca77c55fc2c04e40163011beeabe5f0 SHA-1: 446188e51c9ca534218243ac9e82a72d530d1bdc SHA-256: d33b266e7e5abd09e1eaf364cddc82885aaaffd7756b838bf0c88109b40e4192
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=the+general+theory+of+alternating+current+machines+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are hosted on shopify.com. The document body, though partially corrupted, contains the same URL as the redirector, suggesting it's the primary lure. The file's purpose appears to be to redirect users to a malicious site via this link.

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=the+general+theory+of+alternating+current+machines+pdf In PDF document text
    • http://files.ethanemersonmusic.com/uploads/1/3/1/4/131406892/5610205.pdfIn PDF document text
    • http://files.luciecerna.com/uploads/1/3/0/7/130738993/vaximotudumupoka.pdfIn PDF document text
    • http://files.frackfreecolorado.com/uploads/1/3/0/7/130740391/1cf4dd0f.pdfIn PDF document text
    • http://files.vafercapital.com/uploads/1/3/2/6/132695372/tefib_deludu_munumilow.pdfIn PDF document text
    • http://files.theindianexpresskadhai.com/uploads/1/3/2/6/132695372/rezoninu-volewuwowure-fapigeze.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/1/0429/7015/3113/files/nalesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1791/0946/files/arte_contemporaneo_en_colombia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/movaxetutoxuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0000/3747/files/82468213999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tavolotifejenirogamofiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/rogudapewetajuxosopijugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2788/9308/files/merge_sort_pseudocode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7803/3313/files/38199347059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/rubebototazud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2282/6142/files/3557870172.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_off0000c65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65D 5620 bytes
SHA-256: 1af74f4c161cfb5d0cc97ea2448f44ed323918267c0de3fc53f3a59d61e1c4f9
font_01_sfnt_off0000d961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD961 10976 bytes
SHA-256: 5e3fee7ba19ea16b96c9841e5ceb597ecfb2552d0f9f4dec35c554c4852e741e

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