Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82bf6b16b58563f…

MALICIOUS

PDF

40.7 KB Created: 2020-08-05 09:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62d7ac837df454eea19120d19acebe0e SHA-1: ffb3da6cf3b585ff1defe6bcfa8bdb37bea16694 SHA-256: c82bf6b16b58563f8dee3fbacc3047221f2c54efb9804d5307c461c823381de2
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs but one critical link to a known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=wild+animal+worksheets+pdf`. This suggests the document is designed to lead users to malicious sites under the guise of providing worksheets.

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=wild+animal+worksheets+pdf
    • http://files.theedgecenter.net/uploads/1/3/1/4/131408942/tegez_rovag.pdf
    • http://files.casting4growth.com/uploads/1/3/1/4/131453333/kozavaraduvive_motololiza.pdf
    • http://files.protegearts.com/uploads/1/3/2/6/132696512/4978113.pdf
    • http://files.barrygjohnsonsr.com/uploads/1/3/2/8/132815181/1087955.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/bitud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sejil.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/applied_spatial_analysis_with_r.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/38874447653.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/47149934361.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7206/files/13036097133.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/peptic_ulcer_disease_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/6811/2550/files/11930585166.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/bomifew.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/wedusejisosuvevo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/17645145260.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_off000060eb.bin
ec678fee3ef16f5e401336a8cbdd19d45c11bd341ded2c1ecba97970d094eba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60EB 5448 bytes
font_01_sfnt_off00007363.bin
8e8a3a6503a29ba923f3ae5bc2c49e9c83df24e095756b97b02123e1612fcaec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7363 10132 bytes

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