Malicious PDF — malware analysis report

Static analysis result for SHA-256 86042c1c8e6a69c0…

MALICIOUS

PDF

36.7 KB Created: 2020-08-09 01:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 879335986163bb96c6732fb38341d7da SHA-1: 3dd62a14348236df1960b3e6eb50daab18a168aa SHA-256: 86042c1c8e6a69c0411f9b654d8a60b933ea269b19c9d25e5692d656a71d9c35
128 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a download for a 'Warhammer 40k 8th edition rulebook'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the presence of a call-to-action phrase further supports a social engineering lure. The document also contains a large number of embedded links, many pointing to Shopify, which is flagged as a PDF link farm.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=warhammer+40k+8th+edition+rulebook+pdf+download
    • http://files.mscrystalhaggard.com/uploads/1/3/0/7/130740053/fobosel-ridizuf-sijixaxesi.pdf
    • http://files.sigmachitowson.org/uploads/1/3/1/3/131381985/logonok.pdf
    • http://files.empoweredbyamy.com/uploads/1/3/1/4/131484133/27580.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0433/1608/4891/files/o_neoliberalismo_histria_e_implicaes.pdf
    • https://cdn.shopify.com/s/files/1/0436/4448/5790/files/caballo_de_troya_5.pdf
    • https://cdn.shopify.com/s/files/1/0434/7517/3528/files/nibemojaxireduwinonapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/limawolalugiwil.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/69681856932.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/97504376618.pdf
    • https://cdn.shopify.com/s/files/1/0434/8513/5014/files/75560165050.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/najefobojomafebawutume.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/kuguxolal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.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_off00004f07.bin
5b74c6480ea08d31c790bff5d0e5f683d1a41f2aac5d60ea5513663c3d26b2fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F07 5836 bytes
font_01_sfnt_off000062d1.bin
16baa3f864466c3feae19cbc0237f2151ec2d62d5167f6dec316b4eb67ce917d
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 10128 bytes