Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf5bbf032945656…

MALICIOUS

PDF

45.3 KB Created: 2020-08-12 01:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2afbf19a4ea747fe01f2025bcc59733 SHA-1: 26e7f9e82700359818410a993da975c2e772b78d SHA-256: ccf5bbf032945656df83be5fc304d49d95534dd8309fc1658042860528969b6e
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits a PDF link farm heuristic, with numerous links to Shopify-hosted PDFs, one of which is the primary IOC. The document body, though heavily obfuscated, contains the same malicious URL. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the PDF might be a precursor to downloading a password-protected archive, a common tactic to bypass gateway security.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=acertijos+de+logica+matematica+con+respuesta+pdf
    • http://jiweke.coda-pdx.org/uploads/1/3/0/7/130738568/20b95d53bb2fd.pdf
    • http://files.katemarshallmaths.com/uploads/1/3/2/6/132682758/kagijobekofubeb-kiguzuteponix.pdf
    • http://jugagizu.startingoverabuse.com/uploads/1/3/0/8/130814297/6aaf15dda9.pdf
    • http://files.motivationalmowing.com/uploads/1/3/1/3/131384359/dubofidem_zusebudilov.pdf
    • http://files.katemarshallmaths.com/uploads/1/3/2/6/132682758/kagijob
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/xamulizofovubifuk.pdf
    • https://cdn.shopify.com/s/files/1/0445/3341/6095/files/bureaucracy_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/document_to_converter_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0452/6581/3666/files/97297124482.pdf
    • https://cdn.shopify.com/s/files/1/0431/0545/2193/files/99887778737.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/asce_7-_05.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/zetur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/gimp_user_manual_2._8.pdf
    • https://cdn.shopify.com/s/files/1/0435/5584/8355/files/51188891830.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/zizof.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/jiwevanogabewotifo.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_off00006f68.bin
46952bb2926d79e8e9d35dbfcaea78e365551813939a53b28fe98fc7343a83ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F68 5540 bytes
font_01_sfnt_off00008224.bin
6f4181dc6ff610e22b5c2ee27a475cda1ac2f0d15057b8ee04cb7637d6a41d60
pdf-font-stream PDF embedded font (sfnt) at offset 0x8224 11048 bytes