Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8357be0fd45c24e…

MALICIOUS

PDF

46.6 KB Created: 2020-08-02 12:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89da5870d39d45268bf1e0907db3fd44 SHA-1: 5a0cf88c8d180ac633480455325b5c1f5544328c SHA-256: c8357be0fd45c24ec5e10fb454a2da0534243c3d8770f3eaaacb38e1810abc00
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=simple+mehndi+designs+for+beginners+pdf'. The document body, though partially corrupted, contains text related to 'simple mehndi designs for beginners pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise malicious intent. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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=simple+mehndi+designs+for+beginners+pdf
    • http://files.stjoseph-stpaul.com/uploads/1/3/0/7/130775950/8226148.pdf
    • http://files.roslyn327.com.au/uploads/1/3/1/4/131454373/6d3c37d72.pdf
    • http://files.carolynforonda.com/uploads/1/3/0/7/130738915/f9135ebfa7b.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1563/files/2475705685.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/68711363552.pdf
    • https://cdn.shopify.com/s/files/1/0427/8157/3279/files/pisonanudag.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/sodigezalugizapimo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/tomoni.pdf
    • https://cdn.shopify.com/s/files/1/0433/4531/3941/files/fire_mage_leveling_talents.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/obiee_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/lasusezixoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8658/files/webmail_atlantech_net.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/sofinosarasigikoretoduv.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/beelzebub_episode_1_english_dub.pdf
    • https://cdn.shopify.com/s/files/1/0437/1985/2187/files/nafunogofigivo.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_off00007b16.bin
ddc05f229fb17e5f59486bcbfd5d06cf6a84dfc8a585995b64a039f709e6d5b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B16 5488 bytes
font_01_sfnt_off00008d89.bin
83b6dc369a7a3208aa2ad4efac7c6a8498eb8445e6b50b9c63097037c9184de6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D89 9388 bytes

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