Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e46d5c483374d1f…

MALICIOUS

PDF

44.4 KB Created: 2020-08-30 10:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48746accd4be5487e449c2bbcdebdcb4 SHA-1: ce0fce4c1292158d163e5b37968b98454c328b3f SHA-256: 8e46d5c483374d1f5953af0db258a9d1cf1b2983049f079523f1f3f1199b9027
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=geometry+formula+sheet+high+school'. This URL is presented within the document body, suggesting a social engineering tactic to trick the user into clicking it. The file also exhibits characteristics of a link farm, with numerous embedded links, likely for SEO manipulation or to obscure the malicious destination. No scripts were extracted, but the primary attack vector appears to be the malicious redirector.

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/wix?keyword=geometry+formula+sheet+high+school
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/46920973710.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/41984304778.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/australian_dental_association_infection_control_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0462/6746/5890/files/teacher_s_guide_book_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0445/6543/0431/files/convert_html_to_free_online_conversion.pdf
    • https://static.usrfiles.com/ugd/fd3290_81530c7cd6b1455ea56c5f6734f5b842.pdf
    • https://static.usrfiles.com/ugd/3b7182_5b7295f235d84759afcac37d7c870c6e.pdf
    • https://static.usrfiles.com/ugd/de65f7_79899ef2a2a5464795c52cfa7bea3e5a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9d5f0e33d024f5fb317caa146eee7c3.pdf
    • https://static.usrfiles.com/ugd/136d07_66de4a432d5c4d8087855bd5722358b7.pdf
    • https://static.usrfiles.com/ugd/ecec20_edbb66115ee94bd7b8cac81301025f78.pdf
    • https://static.usrfiles.com/ugd/b3bc21_cec0f7a407b24247b5b7712260bbdeb5.pdf
    • https://static.usrfiles.com/ugd/c5d40f_9515dd3447d34d8cb17dee6d2213e565.pdf
    • https://static.usrfiles.com/ugd/b13fd1_e1c0c641ebf646f4b42f4e20c633c3c5.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/biopsychosocial_model_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/20645536701.pdf
    • https://cdn.shopify.com/s/files/1/0435/3097/7431/files/xotekadabi.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/
    • https://static.usrfiles.com/ugd/b3bc21_cec0f7a407b2424

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000703e.bin
9f000417de84195eb0db4eb4cc0fc360ff5797373678fa96a334537f4730284c
pdf-font-stream PDF embedded font (sfnt) at offset 0x703E 5428 bytes
font_01_sfnt_off00008299.bin
d864d9dd0d090e1b1ca44348ce6bc1e868eee382fbb54c166fffe4ebde8fa745
pdf-font-stream PDF embedded font (sfnt) at offset 0x8299 9904 bytes