Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb3212390029d6b…

MALICIOUS

PDF

42.0 KB Created: 2020-08-02 00:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aadfabac3a902d5fdea5530f1840edbc SHA-1: ecf4f79915f23fc278bc51b076247677dedb6d36 SHA-256: bcb3212390029d6b71e5e09ffe01987e326ab47f72ed1852ff7532820d58b9ff
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm strategy, likely to obscure the true malicious destination. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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=star+wars+visual+dictionary+pdf In PDF document text
    • http://files.jsarchiveconsultancy.com/uploads/1/3/0/8/130814245/xemuzisisojise.pdfIn PDF document text
    • http://files.thuruthoorsinaimount.com/uploads/1/3/0/7/130740173/68bc4f.pdfIn PDF document text
    • http://files.cruzing4photos.com/uploads/1/3/0/8/130874211/59ae8f.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/1/0430/4686/3005/files/pamowoperepagow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/gutewux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/17004429175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0379/7916/files/32200153267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/sulobobar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/pokemon_hilda_bondage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/60169234704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/remove_characters_from_string_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/32076137193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/14460053816.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0A 5504 bytes
SHA-256: 2a0cf3c43fe1e3c84592ca2c1a47d1870fe01a813630fdf9920088c80abf7145
font_01_sfnt_off00005eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEF 10588 bytes
SHA-256: 9374adf39c66d47a423814557680c3b669a899c04a55a57bdfc3fa76ee255693
font_02_sfnt_off000082ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EE 16832 bytes
SHA-256: fd8bcd6c9d5653f5ca42e7a0da8c37bb11293382d085f187bfc5f0104eb230c0

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