Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b1731cb3949a04…

MALICIOUS

PDF

39.8 KB Created: 2020-08-15 16:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01bd3af26da6496e3997a20168ce35ae SHA-1: dc6767f6747367ed9d98f5bc18892c694de6cf26 SHA-256: 58b1731cb3949a04cb5876305c9c5aa174d48c0715b961814938f35695184cd3
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF documents, a technique often used to inflate search engine rankings or distribute malicious content. One of these links, 'https://ttraff.com/pify?keyword=autopilot+raymarine+st6000+manual', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be corrupted or obfuscated, but the presence of the malicious redirector and the link farm strongly suggest a malicious intent, likely to lure users to malicious sites.

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.com/pify?keyword=autopilot+raymarine+st6000+manual
    • http://files.blackwomenrhetproject.com/uploads/1/3/0/9/130969352/ziruni_limadipo_sowan_bivenupesesanub.pdf
    • http://files.rshroff.com/uploads/1/3/0/7/130775199/nekijajola.pdf
    • http://files.robinsonclarinets.com/uploads/1/3/1/4/131453114/6e43734.pdf
    • http://viguronid.revmadlynbarryruch.com/uploads/1/3/1/0/131070112/nemaxedezivun.pdf
    • http://files.curebalm.com/uploads/1/3/0/7/130775606/niwaxadesig.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/80651978203.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/94218103577.pdf
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/724693027.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0430/8697/1029/files/prueba_ser_bachiller_enero_2020.pdf
    • https://cdn.shopify.com/s/files/1/0447/3815/0549/files/barometer_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/ledatevaginejujuwez.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/vewujoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/academic_ielts_task_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/fesoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7013/files/81990474024.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_off000056fa.bin
aee1be36ffefa244ad073db5ac6a95c5ae8edf17d1851046c061954adf0ce617
pdf-font-stream PDF embedded font (sfnt) at offset 0x56FA 5352 bytes
font_01_sfnt_off0000690d.bin
9c49f63e0afa0f7347714e39d56d086c2393cea4af9bb987e4412ea94deef039
pdf-font-stream PDF embedded font (sfnt) at offset 0x690D 13036 bytes