Malicious PDF — malware analysis report

Static analysis result for SHA-256 405fdb565f64ac11…

MALICIOUS

PDF

59.5 KB Created: 2020-07-30 03:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 23d945a4cac837cd5ad57f6ff9ba268b SHA-1: 19a75e0a9731b099084124247e383948132698ee SHA-256: 405fdb565f64ac111300791175bc6f47970a7d6eb050c04d4a3c1cc4e497f27b
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to lure users with search engine optimization tactics, ultimately redirecting them to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to ttraff.cc, which is known for malicious redirection. The document body, though heavily obfuscated, contains keywords related to the lure. The ML classifier also strongly indicates maliciousness.

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.cc/pify?keyword=oral+cancer+pdf+download In PDF document text
    • http://files.makeshiftcoaching.com/uploads/1/3/2/6/132681976/7271237.pdfIn PDF document text
    • http://files.ucmun.com/uploads/1/3/0/9/130968921/zinapu.pdfIn PDF document text
    • http://files.borelgame.com/uploads/1/3/0/7/130776518/pigazurafuloxaxik.pdfIn PDF document text
    • http://files.michellekschilling.com/uploads/1/3/1/8/131856476/kifazuxixevoval_lonudanejefojit_dajukubu.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/1/0434/2313/7943/files/karoxaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ziduvawijixivobufanevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/poxawasazijiserid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4608/2472/files/73385123850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/jovuvojipaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/32834237031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/21261302545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6635/0998/files/dobivezexijavunenekun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5189/0341/files/xepufujigozogofideromobur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6345/9486/files/21467205812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92313200312.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_off0000aded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADED 4752 bytes
SHA-256: 97abc0e4d5a957f8d3f20a57cc1d9f4f23464cc29864cfab130bbca4d00bd948
font_01_sfnt_off0000be27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE27 10208 bytes
SHA-256: 4fd0f9390fcc30e8bcabc3152c15a24f8ced7886048d88a6848e1b100fe29fd8

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