Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07c0fcc8d8801ff…

MALICIOUS

PDF

50.6 KB Created: 2020-08-09 16:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 832398e6837e77ed4ff1f52a6c4b8e57 SHA-1: c83648ea35dfdb457c6507f8007fa56b50bd67a9 SHA-256: b07c0fcc8d8801ff7edba415b97dc4a2899323033171efffc6b2141cd4b7e648
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a common tactic for SEO poisoning and link farming. One critical heuristic identified a link to a known malicious redirector, https://ttraff.ru/pify?keyword=great+expectations+abridged+version+pdf, which is likely the primary malicious payload delivery mechanism. The document body also contains this URL, further reinforcing its role in the attack.

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=great+expectations+abridged+version+pdf
    • http://files.cowboyjamboreemagazine.com/uploads/1/3/0/7/130740589/gosogepo.pdf
    • http://files.b2bsolutionsgroup.net/uploads/1/3/2/6/132682564/zubovinudaxudew-gibosumijix-nuvafosodosa.pdf
    • http://files.smbwriting.com/uploads/1/3/1/3/131383727/8e270127e563.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/jilerasuzawisukosonazunip.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/17287767499.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7495/files/timupizeruparirimeseja.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/69941128518.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/zemovefinijezawarake.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/karabe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2296/5160/files/92017992700.pdf
    • https://cdn.shopify.com/s/files/1/0430/8051/5745/files/33069416250.pdf
    • https://cdn.shopify.com/s/files/1/0435/6866/0643/files/92975987006.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/zosuwefiparelimopagedo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/39116290028.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/fogalavemadujawer.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_off00008726.bin
60351f3313bf263ac6ed61edaa96943306e7bea56b62668ca19b9384fd77991a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8726 5588 bytes
font_01_sfnt_off00009a3f.bin
f8ebb81bc382c584d240414d29fd04d59565f842fb290b2d04d76ba9b5bc13cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3F 10164 bytes

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