Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b07660b48038cba…

MALICIOUS

PDF

40.4 KB Created: 2020-08-24 09:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4876f67f3dae6fee442415761dc24081 SHA-1: 6ca9d4dc06a6448b3b23b172253cda249848d393 SHA-256: 9b07660b48038cba70897f02ec1128d7a9a0d7d9742a6283efbec438e8249e1b
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a redirector service known for malicious activity. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=fmcsa+medical+examiner+handbook+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking it. The presence of a link farm heuristic further supports the malicious intent of directing users to external, potentially harmful, sites.

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=fmcsa+medical+examiner+handbook+pdf
    • http://files.wethersfieldwoolfarm.com/uploads/1/3/1/4/131453989/5892314.pdf
    • http://gabozib.sarahinscience.com/uploads/1/3/2/6/132696067/vojowemira_gopufigulowis_fulirawiro_magimeke.pdf
    • http://files.debisdancestudio.com/uploads/1/3/0/9/130969695/jikare.pdf
    • http://files.theblackrabbitlaleston.co.uk/uploads/1/3/0/8/130813301/favelepaja-waniviva-mejuxedi-xigak.pdf
    • http://files.brookesonsphotography.com/uploads/1/3/1/4/131438692/2a7385047.pdf
    • https://cdn.shopify.com/s/files/1/0440/9258/8184/files/six_sigma_yellow_belt_study_material.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/sodium_phosphate_dibasic_msds.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4669/files/zarchiver_pro_latest_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/7173/2889/files/5141219429.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/2005_yamaha_v_star_650.pdf
    • https://cdn.shopify.com/s/files/1/0434/4643/6006/files/free_chess_titans_game_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/20935682925.pdf
    • https://cdn.shopify.com/s/files/1/0432/4134/1092/files/pabozibajol.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/67967187889.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_off00005f90.bin
c3060241869cc25a20910cda5c7cd92a4462c22e1ebf83f31f19598d9b5ff5f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F90 5620 bytes
font_01_sfnt_off00007275.bin
35e3b40025a7fe83787d77d7c061473132ee03e435f288fc001c2c13369c80b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7275 10048 bytes

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