Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef48a5ebd4b6cdf…

MALICIOUS

PDF

42.7 KB Created: 2020-08-09 23:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92aac9170c6dd22f7cbaa7e43584667e SHA-1: db2bb2b4bf0a08c389fcf05a07bf6e6793bd8284 SHA-256: 8ef48a5ebd4b6cdf06d8d0ac90dc35675ffae753206124d97ab95d7fe419e84c
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=coulomb+s+law+practice+problems+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a PDF link farm further supports the malicious intent, aiming to distribute links to potentially harmful content. No scripts were extracted, and the document body was heavily obfuscated, but the malicious redirector is a clear indicator of a phishing or scam attempt.

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.com/pify?keyword=coulomb+s+law+practice+problems+pdf
    • http://files.earningadmission.com/uploads/1/3/2/7/132740747/196009.pdf
    • http://fafutir.goldenvalleyffa.com/uploads/1/3/1/4/131438641/a66f22ae38d3ad.pdf
    • http://relulivi.danielshrigley.com/uploads/1/3/2/7/132712207/gofulomud_fisamoguzipa_fekevedozadavel.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3746/files/envision_math_grade_2_topic_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/6256/5795/files/56702758628.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/shear_force_and_bending_moment_basics.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/witapenewoki.pdf
    • https://cdn.shopify.com/s/files/1/0429/6550/0060/files/16916060812.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/58955156173.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/2455113814.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/duzufazuvezijeduk.pdf
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/bapokudob.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/pefuzevopawamosemumi.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_off000063f8.bin
221aab3d8cfe6c9358acd9c5027b86a413127a9f001a301843378410e5aa0f22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F8 5440 bytes
font_01_sfnt_off00007666.bin
07dabf14c5ae210fa8e83f85793801dfd8253099f6a68d1286595e4ae51c17e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7666 11096 bytes

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