Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ba8d321dc2fa3d…

MALICIOUS

PDF

34.5 KB Created: 2020-09-04 09:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1de457d451d1888cdfa17b85ffff74b SHA-1: 3e079d0ea64971b9b38c7135e19a4d77baf830a0 SHA-256: 55ba8d321dc2fa3d4b09ccbec2fde3e23c0f9f5de05721b0dba6dadce6f13bfa
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.club/wix?keyword=missguided+halloween+jumpsuit`. This URL is likely part of a phishing or scam campaign. The document also contains a large number of embedded links to PDFs hosted on Shopify, which is flagged as a link farm. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector and link farm suggests a delivery mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=missguided+halloween+jumpsuit
    • https://cdn.shopify.com/s/files/1/0434/6154/2054/files/gta_v_cheat_codes_pc.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2831/files/my_alarm_clock_mac_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5832/files/99043929422.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7976/files/luwifel.pdf
    • https://cdn.shopify.com/s/files/1/0432/0378/8960/files/roblox_generator_no_or_survey.pdf
    • https://static.usrfiles.com/ugd/09c3c7_842a850bb4ed41f4bc3e0f27bf2af2c1.pdf
    • https://static.usrfiles.com/ugd/4a6c57_84d5eceaf91d4e9d9eab856e2e4f5f57.pdf
    • https://static.usrfiles.com/ugd/cf5aa9_d8c50c5c9dd14766b17774a1fc3891a5.pdf
    • https://static.usrfiles.com/ugd/80c1db_994293099bf941d7a7c7753871b4b091.pdf
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/wowegobib.pdf
    • https://cdn.shopify.com/s/files/1/0447/4303/2983/files/dakarisimosuda.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/baxufowanozafagavadi.pdf
    • https://cdn.shopify.com/s/files/1/0454/0166/9800/files/aprender_ingles_rapido_y_facil.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/96071143885.pdf
    • https://static.usrfiles.com/ugd/e8dba5_ca73679224144d52bab79a74121dbfd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_73750ed6280945138afa5b4d7ac31947.pdf
    • https://static.usrfiles.com/ugd/3aee12_5b23da0a323442e79003302044a8ea7c.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_off0000484e.bin
04c9d0b0d1e61fd79111e5dc35d3f18bd781d2b27be4c654b1bbfe3be57a0928
pdf-font-stream PDF embedded font (sfnt) at offset 0x484E 5452 bytes
font_01_sfnt_off00005ad4.bin
4451f1c203f0337e67c3968a7e6c82284ac6b3d6c0f1e2022901cf95435ce96a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD4 10052 bytes