Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c764aac3d65042…

MALICIOUS

PDF

38.9 KB Created: 2020-08-04 13:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 945eabe3a8dffbe63f3ef534515ca3b7 SHA-1: b9aef0e32cf12f5d7aea5875752e1fddfce5d80a SHA-256: 75c764aac3d65042d1696bd8bd2a0ef108a237516e8f54bc326fcbde85a5ffc6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body is heavily obfuscated, but the presence of numerous links, including one pointing to 'ttraff.com', strongly suggests a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, likely for SEO manipulation or to host further malicious content.

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=birdland+bass+tab+pdf
    • http://files.healthpoweredbyyou.com/uploads/1/3/0/7/130776067/butowub.pdf
    • http://files.autotrickler.com/uploads/1/3/0/7/130776673/miserujemugi.pdf
    • http://files.jovaunholmes.com/uploads/1/3/0/8/130873973/818c81.pdf
    • http://files.caribbeanpsyarts.com/uploads/1/3/1/4/131408970/lonefumi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/tinine.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9887/files/remove_duplicates_in_list_python.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/sarudelur.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/centricity_pm_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/7086/2998/files/89609404944.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4566/files/votudizanuxoxadowijima.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/50211299511.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/tanefuveragulerev.pdf
    • https://cdn.shopify.com/s/files/1/0434/0288/7322/files/zewarufugadaxelasemovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2440/1063/files/99683799700.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/novawoguzagole.pdf
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/bobcat_610_specs.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_off00005137.bin
d80e1239427372ac10a55d915adab9319ddbfc0eea383ae78bf64a740ad1e8e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5137 5224 bytes
font_01_sfnt_off00006301.bin
8edb8bb0db34970696310df133dcba2d6f33318a8868a18fac5c209a79b3c3ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 13216 bytes

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