Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3dc55278d7c52cb…

MALICIOUS

PDF

41.6 KB Created: 2020-08-02 19:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c0dd11f7d0a7a37ce1e24b39169951f SHA-1: 99b1bf77ff2ef535c2b688bc2e602993661f6e95 SHA-256: b3dc55278d7c52cb8dc82d9396e67cec20e832f17d933ff910534f98e573b495
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, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=for+honor+valkyrie+gear', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, also contains this URL and other PDF links, reinforcing the attack pattern of a link farm designed to redirect users to malicious 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.cc/pify?keyword=for+honor+valkyrie+gear
    • http://josugemuz.plantbasedwithrobin.com/uploads/1/3/1/6/131636612/saturelolol.pdf
    • http://files.waytoomuchstuffintheattic.com/uploads/1/3/1/8/131872015/f1104f0b131e6a5.pdf
    • http://files.mrfleischer.com/uploads/1/3/1/4/131406843/70f3d40a1.pdf
    • http://files.top-tungsten.com/uploads/1/3/0/7/130775129/516ee74d4.pdf
    • http://files.simplegiftssyrupandsalmon.com/uploads/1/3/0/9/130969312/7823327.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/xuvenipibetubaxatil.pdf
    • https://cdn.shopify.com/s/files/1/0434/7746/7288/files/acknowledgement_dissertation_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/xotuwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/32831211554.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/kikekamazas.pdf
    • https://cdn.shopify.com/s/files/1/0439/3703/8494/files/95562594170.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3969/files/sojekolapilafepepareseg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/parejugumonaximeba.pdf
    • https://cdn.shopify.com/s/files/1/0435/7832/7199/files/mamewulojokumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/2751802767.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/65181907774.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_off0000658e.bin
6104e7d4e640d74da52014af3dad92ac78d9e44fc9cf2ab77d04ec38de346eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658E 4952 bytes
font_01_sfnt_off00007675.bin
a9860bec3dbf1dda38013b2d64e6ae5a4b40218a28ce32a711fee1933fed9ccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7675 10336 bytes

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