Malicious PDF — malware analysis report

Static analysis result for SHA-256 e102627761e786df…

MALICIOUS

PDF

57.0 KB Created: 2020-08-12 11:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d5d6c0610c43d8b56f557cd9c9c7545 SHA-1: 24a2785c922b55bee6c54b842add92b623c2fca6 SHA-256: e102627761e786df7dea6c2ef042415e2c17c5a578fb0c4c847dda46c36e76be
180 Risk Score

Malware Insights

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

This PDF document employs a social engineering tactic by requesting sensitive recovery information, such as private keys or backup codes. It contains a mass of external links, with a critical heuristic identifying a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=asymmetric+encryption+algorithms+pdf`. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a lure to a malicious site.

Heuristics 4

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.ru/pify?keyword=asymmetric+encryption+algorithms+pdf
    • http://rolowed.poetrycityusa.com/uploads/1/3/2/3/132303189/7998851.pdf
    • http://files.mailin1.farmarik.com/uploads/1/3/0/7/130740138/91e25.pdf
    • http://mazifoza.kellyharkinsdesigns.com/uploads/1/3/1/6/131637047/ab7cb.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/newejituduwaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4664/files/kixironusepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5246/6325/files/13810063147.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7305/files/87648545415.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/look_back_in_anger_text.pdf
    • https://cdn.shopify.com/s/files/1/0430/9126/3649/files/aprendiz_de_brujo_pnl_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31443612403.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/case_brief_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/rifubimifubitofaf.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_off00009f32.bin
58b780f87da392dc8cac017f9d58bdff37e789195cc9621115f5cac433251d43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F32 5660 bytes
font_01_sfnt_off0000b247.bin
0718a2795be947b72192dd573e3ba241ba7cf912ce51abbad5ad0d2415e222c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB247 10820 bytes

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