Malicious PDF — malware analysis report

Static analysis result for SHA-256 f339bb8a767c96c6…

MALICIOUS

PDF

45.0 KB Created: 2020-08-12 07:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7156adba75a533c60a8fa6f145af0e86 SHA-1: f4b9de5358e54a50365c27ba2a481a636cb47f5d SHA-256: f339bb8a767c96c64555bd1912031ff848df0408d838e62fde37c2e5b11b7cae
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF document contains a mass of external links, including one identified as a malicious redirector. The document body text, though partially corrupted, suggests a lure related to a job application. The primary malicious URL, https://ttraff.cc/pify?keyword=a+sample+job+application+letter+pdf, is likely used to redirect the user to further malicious content. No scripts were extracted from this sample.

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=a+sample+job+application+letter+pdf
    • http://files.mattmtong.com/uploads/1/3/1/8/131856956/vofuvof.pdf
    • http://files.alexanderanddavis.com/uploads/1/3/2/6/132681556/xukog-fipobofamarezi.pdf
    • http://files.islandconsulting.com.au/uploads/1/3/0/8/130814515/441a3e30f22ff.pdf
    • http://files.shepherdsridge.org/uploads/1/3/2/7/132740498/fepig_kadutasumu_bazogo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/june_2016_physics_regents.pdf
    • https://cdn.shopify.com/s/files/1/0433/8624/1189/files/dosofapanapabosalamizoju.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/edema_agudo_pulmonar_neurogenico.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0604/files/in_my_mind_pharrell.pdf
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/latelovututabijivosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21617342462.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/papifisuzoxexonivugeto.pdf
    • https://cdn.shopify.com/s/files/1/0447/9831/2609/files/15055610654.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/78968310326.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/vocabulary_words_for_cat.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0617/files/47136462089.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/19575796080.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/34093347132.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006515.bin
6b5732298e4df482d5788f6ee406d082fbb4b51bbd6ec1fbc63b5d682ea5e4f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6515 5292 bytes
font_01_sfnt_off000076ea.bin
96e91d556a117c9f71f7e1978072b009d7998b38bde9f7794214d33b69bdbe56
pdf-font-stream PDF embedded font (sfnt) at offset 0x76EA 9976 bytes
font_02_sfnt_off000098f6.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x98F6 4324 bytes