Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4991b1905599a0…

MALICIOUS

PDF

68.9 KB Created: 2020-08-06 08:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9cab211fa783902f52ed09b8e51c2979 SHA-1: 6cc9ee56dd315c32cd4782b5d638abbb2336a814 SHA-256: 4d4991b1905599a08649f1418a3e6a1c1cd9923a1a315da274a2d6becdea7505
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL 'https://ttraff.ru/pify?keyword=basel+3+requirements+pdf' is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL, suggesting it is the primary lure. The presence of numerous links to external PDFs, many hosted on potentially compromised or controlled domains, indicates a campaign to distribute malicious content.

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=basel+3+requirements+pdf In PDF document text
    • http://files.dump-trailer-rentals-palmbeach.com/uploads/1/3/1/4/131438570/503248f0589b1.pdfIn PDF document text
    • http://files.candlerock.org/uploads/1/3/1/3/131384424/5554214.pdfIn PDF document text
    • http://files.markusfx.com/uploads/1/3/1/6/131637108/zakevup.pdfIn PDF document text
    • http://files.eastbayesl.com/uploads/1/3/1/8/131858661/dajudebap_kudoferakos_gexiralo.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/1/0437/4138/0759/files/55342675634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4169/2580/files/punobesigutadugoxevigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/60542501965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4605/0728/files/texosobepup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/maryland_form_502_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/canoscan_lide_110_scan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/tosev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9524/5475/files/26071447163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/risujakinofisep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/viking_pop_up_camper_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/lafumivoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/29611097013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9723/5363/files/dibajijurexuloxan.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 4

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_off0000ce5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5D 5528 bytes
SHA-256: beeefa99419a3b61959e2103f0558a0feca3e456010f21510b240b055515a418
font_01_sfnt_off0000e10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10A 11048 bytes
SHA-256: ee3afea77333c871545c652ea681c9bfc5663f67e0c18f5b8c6dcea701c42f34

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