Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d20e63a39ef075…

MALICIOUS

PDF

35.5 KB Created: 2020-09-18 08:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0b95517a4ba03ac42caafaade5a4218 SHA-1: 8b930f04089855b1ddfa29eb0e9792e8aeda0392 SHA-256: 51d20e63a39ef0757b8f895b63b5d0acb1d22143f96a1cd592e63c5895198b23
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=beowulf+kenning+worksheet', which is flagged as malicious. The presence of a link farm heuristic further suggests a malicious intent to distribute or redirect users to harmful content. No scripts were extracted, and the PDF structure itself is the primary vector for the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/wix?keyword=beowulf+kenning+worksheet
    • http://files.allanenv.ca/uploads/1/3/2/6/132681212/4c31132e4576d.pdf
    • http://rifid.mezoopets.com/uploads/1/3/2/7/132740837/nofitekilipew.pdf
    • http://guxidu.itopiacoaching.com/uploads/1/3/0/7/130775350/zixonupuriso_suboviposoxas_losidari.pdf
    • http://files.gabriellefreiretherapy.com/uploads/1/3/2/7/132740836/vijinoxasud-gebonulaker-lifupoxiso-pamitojani.pdf
    • http://files.nariatlantablog.org/uploads/1/3/0/8/130814110/6600358.pdf
    • http://mafoxu.bizexpertz.org/uploads/1/3/0/7/130776298/jogokabew_ditajiw_kokifudutiz.pdf
    • http://files.circleofapparel.co/uploads/1/3/1/4/131453384/a288e1ee059f.pdf
    • http://vijawenez.supercollectorcatalog.com/uploads/1/3/2/8/132814930/sames-govazijo-minifet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5745/3985/files/james_e_talmage_articles_of_faith.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1093/files/apnea_de_sueo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40323832667.pdf
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/76436302766.pdf
    • https://cdn.shopify.com/s/files/1/0450/0425/9492/files/pokewofadutefafu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048ac.bin
ab335be12201e4ae9a47fd9e6b3ad0e4da0bd335b5c47755d3b3414316fd0a80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48AC 5024 bytes
font_01_sfnt_off000059dd.bin
c19933dde3afb7ee6ca7cb903b1fc9234c8319e32f13ae2edb6ebf06ba150139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59DD 12276 bytes

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