Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d51bccfcd3d6e32…

MALICIOUS

PDF

45.7 KB Created: 2020-08-22 02:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cb9af0091fd3f6a220820ad258d1f7f SHA-1: 31ebb412797a99a2c262a5aa9a671b0e6a8b3da7 SHA-256: 4d51bccfcd3d6e32b8d97ff13b8ae601a3af414b6e9b206c89d67c2eba736413
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used to redirect users to malicious sites. One of the primary links points to a known malicious redirector infrastructure at 'ttraff.ru'. The document body contains garbled text but includes the same URLs, suggesting they are intentionally embedded. 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.ru/pify?keyword=discussion+biology+lab+report
    • http://files.primitivedreams.ca/uploads/1/3/1/4/131483361/gukemuxunakun.pdf
    • http://files.corneliahoogland.com/uploads/1/3/2/7/132740264/9741885.pdf
    • http://files.mjglobalcommunications.com/uploads/1/3/2/7/132712011/narikibovovogibog.pdf
    • http://files.tcmusicteacherscollective.com/uploads/1/3/2/6/132681501/bd360e.pdf
    • http://files.thebridalmanor.com/uploads/1/3/2/6/132695636/zujuko-vijabipap.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/rizewutututaju.pdf
    • https://cdn.shopify.com/s/files/1/0463/2477/7117/files/fintech_indonesia_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/calvin_cycle_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2570/files/42875461425.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/8099922477.pdf
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/63654813699.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/boston_globe_sunday_crossword_puzzles.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdf
    • https://cdn.shopify.com/s/files/1/0458/5426/1401/files/analyzing_poetry_worksheet_elementary.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/vugugam.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/90720845607.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/2841814564.pdf
    • https://cdn.shopify.com/s/files/1/0436/3993/1038/files/polaroid_premium_white_mailing_labels_template.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_off0000758e.bin
bbef15c8ed25f5c00da2dd0793a5d694490ca4582ddd67e246e730225038d2c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 5340 bytes
font_01_sfnt_off000087ca.bin
6893f9b82561427edd3e4f91defaf8857ee456c2b09ae68d47cccb9e1cc36d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x87CA 9964 bytes