Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee9e5ac51f1fdb4…

MALICIOUS

PDF

45.9 KB Created: 2020-08-23 17:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 884a7c5cbf9353c79c7ac25d01225069 SHA-1: 6f8d142ced6e8821344e082e46919ec303c3caed SHA-256: cee9e5ac51f1fdb4f3319355e94c92320edcaafdc5c1b8c74da5e5e4d55a28dd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=current+asset+in+balance+sheet'. Another heuristic indicates a PDF link farm, with many links hosted on cdn.shopify.com. The document body is heavily obfuscated and contains what appears to be a reconstructed URL, suggesting an attempt to disguise malicious content. The primary attack vector appears to be social engineering through deceptive links within the PDF.

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=current+asset+in+balance+sheet
    • http://vodof.greenfieldcurriculum.com/uploads/1/3/2/6/132681821/sazojugukateve-banuxivina-zexakin.pdf
    • http://pexafas.sunnybankprinthouse.com/uploads/1/3/0/7/130776138/patos_jirijuto.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0469/files/20294123438.pdf
    • https://cdn.shopify.com/s/files/1/0429/4000/6559/files/wukemesudoseg.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/liwuweravizena.pdf
    • https://cdn.shopify.com/s/files/1/0432/6588/4313/files/hobbs_and_shaw_dvdrip.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9267/files/tijiwijotuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/uptu_b._tech_degree_format.pdf
    • https://cdn.shopify.com/s/files/1/0438/8978/7048/files/99_names_of_allah_in_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/lidorufiborinonepom.pdf
    • https://cdn.shopify.com/s/files/1/0450/1169/7814/files/technical_interview_questions_and_answers_for_desktop_support_engineer.pdf
    • https://cdn.shopify.com/s/files/1/0432/0804/8808/files/43857403454.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/what_country_code_is_33.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/fallout_new_vegas_vault_22_ignite_gas.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_off00007691.bin
2f9df24332a3d9b68f0d57309b0b7a2ad659ab6191d7337fce2dc279776b126d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7691 4932 bytes
font_01_sfnt_off00008741.bin
50c8637f9fe888c09ef74fa5f204364978787345eae3665bfe04a4676b64ec6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8741 10500 bytes

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