Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2aa0f2282e0b0f4…

MALICIOUS

PDF

47.1 KB Created: 2020-08-19 06:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 855e0ad3132fcd46e93b4b5795ab3479 SHA-1: 6b273c2c56eab03b41320e7de38a5956c5ca4208 SHA-256: a2aa0f2282e0b0f4d5c2910f082dbe55efe4ee014d7601dcf2d3f83863b52977
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.ru/pify?keyword=daffy+duck%2527+s+quackbusters'. This indicates the document's primary purpose is to lure users to a malicious site. The presence of numerous other links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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=daffy+duck%2527+s+quackbusters
    • http://files.gretavalleyschool.com/uploads/1/3/0/9/130970022/8db90c4113a17f.pdf
    • http://koluxekiv.runwaylink.com/uploads/1/3/1/3/131379655/ba025.pdf
    • http://vizirezuw.pestcontrolsolutionsla.com/uploads/1/3/2/6/132682182/nagov.pdf
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/34013377443.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9076/files/poguwudogomefozuzivivuze.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6885/files/36016104650.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/760642791.pdf
    • https://cdn.shopify.com/s/files/1/0431/3337/0529/files/56314136789.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/86732318069.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5175/files/aviation_mechanic_handbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1630/files/open_bidding_process.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/59807050492.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/99650969970.pdf
    • https://cdn.shopify.com/s/files/1/0433/6664/5916/files/knee_isometric_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1285/files/95502877143.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22700630349.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d00.bin
1a32b9e749bda3eae256eebb36927142d77a27805d54c4be2d2700ef6982d3be
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D00 5064 bytes
font_01_sfnt_off00007e57.bin
72540aeb1ae9803ab4f86b64906ed30934059d68176ee6f8b491b96c460bff91
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E57 10244 bytes
font_02_sfnt_off0000a132.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA132 4324 bytes