Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf32e5a2ad3bfd8…

MALICIOUS

PDF

43.2 KB Created: 2020-08-21 20:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ce1a41ddf183bd45d6f1684246bd0c8 SHA-1: 8aff99e99cb8d4b21db1879ac3e375dc842475e6 SHA-256: 7cf32e5a2ad3bfd86e87adb17a18108c9eed1aa59da24a3dfa00f08f4ee7af15
150 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous benign-looking Shopify URLs, but also includes a critical link to a known malicious redirector at `https://ttraff.cc/pify?keyword=newsela+pro%252F+con+answers`. This suggests the document is designed to lure victims to malicious infrastructure, likely for further exploitation or credential harvesting. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=newsela+pro%252F+con+answers
    • http://files.sacpb.org/uploads/1/3/1/4/131408103/6283219.pdf
    • https://cdn.shopify.com/s/files/1/0431/2504/7463/files/rimbaud_les_illuminations.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/tech_n9ne_mp3_skull.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/31927200824.pdf
    • https://cdn.shopify.com/s/files/1/0433/3315/7014/files/fusionner_plusieurs_acrobat_reader.pdf
    • https://cdn.shopify.com/s/files/1/0433/2191/7598/files/vigibugapunuzeliva.pdf
    • https://cdn.shopify.com/s/files/1/0433/6258/2693/files/pajisokakez.pdf
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/pabenamepufugevet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/62772319316.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f26.bin
8f5a9fab343e98009eda373aa3c7f513de67826c926a961a7e752039f036a6d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F26 4684 bytes
font_01_sfnt_off00006f26.bin
b11ebcd08158b69c33fe2a7011bd4bb214abf364a251a2ec6c977cf199cdb38f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F26 10300 bytes
font_02_sfnt_off00009250.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9250 4324 bytes

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