Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a8caf685db9d91…

MALICIOUS

PDF

39.6 KB Created: 2020-08-17 09:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6472f73d751089d75cd472c60b8d9259 SHA-1: cff659ef3172fc2a5a1ae6259a1c2c99dddde4ed SHA-256: 59a8caf685db9d9195aac46774a02dc8d20c074a3b80fffcd7b728785335fae5
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is presented with a lure related to 'data entry in excel worksheet'. This indicates a social engineering attempt to direct users to malicious infrastructure.

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.cc/pify?keyword=data+entry+in+excel+worksheet
    • http://lulup.lawofficesofmarkjcarrollpllc.com/uploads/1/3/1/4/131453945/c5f45af3.pdf
    • http://nivis.beo-foto.com/uploads/1/3/1/8/131871699/palulusuvezizex_bebizagerogibi.pdf
    • http://files.themistyvalley.com/uploads/1/3/2/6/132681210/f8409b.pdf
    • http://files.worcesterdoula.com/uploads/1/3/1/1/131163914/2967576.pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4559/files/alphabet_analogy_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4096/files/tubasesiserezizireg.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/75081596588.pdf
    • https://cdn.shopify.com/s/files/1/0431/0535/3885/files/sebaronidasosirexexow.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/psicologia_morris.pdf
    • https://cdn.shopify.com/s/files/1/0432/5110/5947/files/37662702450.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/59917029843.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/sizibam.pdf
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/absceso_hepatico_en_pediatria_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/2950/2874/files/31632451097.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/roadside_design_guide.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_off00005df7.bin
2ce7740c004b2521d3f79c1640e85500a3ac0ea05ba672f5f754cb227fb661ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF7 5212 bytes
font_01_sfnt_off00006fc6.bin
437c8233752192b7a14db3988abf131677615036db86617f8f1a344476216c57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC6 9884 bytes

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