Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf9ecf3926b5298…

MALICIOUS

PDF

40.5 KB Created: 2020-08-09 02:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40ade952adffe1b13c3271c97facefc8 SHA-1: 8ab563fa49cdd0014979d400410c81ba5f50f487 SHA-256: caf9ecf3926b5298902b1f472d5ae8a8756821d5b2d6090f02c2e19499d22064
120 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.cc/pify?keyword=amazing+grace+easy+piano+sheet+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and clicks. No scripts were extracted, but the embedded URLs and the redirector link are the primary indicators of malicious intent.

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/pify?keyword=amazing+grace+easy+piano+sheet+pdf
    • http://files.hawaiineiartcontest.org/uploads/1/3/1/3/131398452/denad_rufugukuvevoj_ruvezatir.pdf
    • http://files.fresnotattooandbodypiercing.com/uploads/1/3/1/1/131164351/812310.pdf
    • http://files.sddragonboatrace.com/uploads/1/3/1/4/131438676/takebexitob.pdf
    • http://files.srcassociates.org/uploads/1/3/1/3/131379875/a592e2ffa86cf4.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/86698855680.pdf
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/42974596542.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/cdr_file_to.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/72277310173.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/fe_mechanical_review_manual_lindeburg.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/mamunexodedu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1765/6728/files/pogode.pdf
    • https://cdn.shopify.com/s/files/1/0438/7454/9928/files/96709961534.pdf
    • https://cdn.shopify.com/s/files/1/0430/3319/8745/files/senakez.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/vunuwudesaxanud.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/toefl_exam_preparation_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/37547759465.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/ragabozu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/milanilevukijulefu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6940/6360/files/tipos_de_cirrose.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_off00005dd9.bin
20f344652a52c05b4509d28590389333dfbcdd20347ee86e9190694748cede0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD9 5680 bytes
font_01_sfnt_off00007118.bin
7553b354e8c3a1b07522d21741f7825dcc8914d89d985872469f20118bde4e11
pdf-font-stream PDF embedded font (sfnt) at offset 0x7118 10368 bytes