Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c847cf66925630…

MALICIOUS

PDF

51.4 KB Created: 2020-08-03 04:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0773b9fc11cfc5c30a531260cc48076e SHA-1: 792e5c39c33d9aad24c618378b06cc40634b928a SHA-256: 25c847cf66925630209f2f73f0ec2ad542c9110b3caa0fc495ee52b3488f97f6
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document also exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector and the link farm structure indicate a phishing or social engineering attempt.

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=a+deeper+love+inside+pdf
    • http://files.victoriabattagliahofmann.com/uploads/1/3/1/8/131856987/bbcda434b5a699b.pdf
    • http://files.goldcoastmodelrailwayclub.com/uploads/1/3/1/4/131409098/6293913.pdf
    • http://files.roxborohomeeducators.org/uploads/1/3/1/4/131406082/xadarid-burew-desugumuj-lejon.pdf
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/50808137912.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/11479343260.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/62320821568.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/bafiluxugubiwuwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6881/6544/files/nas_is_like.pdf
    • https://cdn.shopify.com/s/files/1/0430/0305/2191/files/read_the_jaunt_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/jawebilakilakidalirakimov.pdf
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/22866481515.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/nuridaseverunipurizege.pdf
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/fowuleginan.pdf
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/bobcat_troubleshooting_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5224/files/nugarofixizibolidaw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a9e.bin
9678c4126d52ca185e1530414583312904146ebe9e80746565a073d9df7c60b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9E 4584 bytes
font_01_sfnt_off00007a37.bin
d03129e99c3f7c6b3522a119e5b78536e5d57ab82c6e7a4b00bb811d8ac1a484		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A37 10304 bytes
font_02_sfnt_off00009da8.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA8 16092 bytes
font_03_sfnt_off0000b270.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB270 4324 bytes

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