Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0bb16460c4308bf…

MALICIOUS

PDF

45.6 KB Created: 2020-08-03 16:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 419efab925bbe1a817921c8e73a14268 SHA-1: 5d42d034c89dab8f842a20aea3bba7b8c4e5a57e SHA-256: a0bb16460c4308bf158de0d7a924188c6fd0de09dd7c578a3f9aeca9efb97609
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with SEO link farms. One prominent link, 'https://ttraff.ru/pify?keyword=waiting+for+the+barbarians+novel+pdf', redirects to potentially malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to external sites under the guise of providing PDF 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.ru/pify?keyword=waiting+for+the+barbarians+novel+pdf
    • http://files.ronkachelmeier.com/uploads/1/3/1/3/131383426/buviko.pdf
    • http://files.midcitycarriages.org/uploads/1/3/0/9/130969588/jenagosumakagur_davemekelivobup_surasetevitet.pdf
    • http://files.ironsouls.com/uploads/1/3/1/4/131437683/muxokoguk.pdf
    • http://files.tommontgomeryart.com.au/uploads/1/3/2/7/132740250/6666293.pdf
    • http://files.amychally.com/uploads/1/3/0/8/130874646/radakerovasejaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4903/files/kejiforumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9081/2821/files/44396231269.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/19800011304.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/42849822105.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5461/files/35828935433.pdf
    • https://cdn.shopify.com/s/files/1/0435/5345/6289/files/toastmasters_competent_leadership_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/3160620433.pdf
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/set_to_string_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/9113/2567/files/zufaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/totatibujik.pdf
    • https://cdn.shopify.com/s/files/1/0432/2043/5112/files/tesivesukuwobepe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/tijokekakunuwi.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_off000073f2.bin
6574f81a5929fa889f01be7c2658b25fbcd59c4b23165b9f1cd9e1bcfe13819a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F2 5516 bytes
font_01_sfnt_off000086c3.bin
d7fc3a6f9b38c8a7596312e4e51f7f1ca20bf5f15452def46bdf9de9ca192d20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86C3 10044 bytes

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