Malicious PDF — malware analysis report

Static analysis result for SHA-256 d383e0767a88f092…

MALICIOUS

PDF

42.0 KB Created: 2020-08-21 07:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b19197e50bf683d9399041eb3e1d7621 SHA-1: d535bc985b43b4181abf0c78b68f707ef42708f5 SHA-256: d383e0767a88f092588c03e3a4ac02d9306804d4d2726213c38cc4db819bb4bc
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=skyrim+filial+bonds+guide'. This suggests the document is designed to lead users to malicious content through a link farm, likely for phishing or malware distribution.

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=skyrim+filial+bonds+guide
    • http://rexizagi.division16south.com/uploads/1/3/2/6/132680874/kaboxekagamiji_fewava_bokosofixomire.pdf
    • http://files.mark2inc.org/uploads/1/3/1/4/131453194/fawesugole-wabuxoguvibojis-tinexivowof.pdf
    • http://juninalas.danieljbarnes.com/uploads/1/3/0/7/130739197/tepoze.pdf
    • http://sojaxoxa.juliannacrowder.com/uploads/1/3/2/8/132816202/vikifilukuguwopag.pdf
    • http://nujip.pinkzebracheer.com/uploads/1/3/2/6/132682093/165a8ebcfe7b.pdf
    • https://cdn.shopify.com/s/files/1/0463/3447/6449/files/satofuduwufe.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/jifex.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/kobefufiberu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7609/1045/files/jepepuso.pdf
    • https://cdn.shopify.com/s/files/1/0437/7998/1470/files/girl_guides_promise.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/nigoturosuleragemovikux.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/57198309264.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/tiligisuju.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5459/files/posipesugawunupozev.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/80917083121.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_off000065b1.bin
0cc958188b1329a18ecf828d680cfc4e39e9205e6ff2d954397fe2b0d5cf31a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B1 5636 bytes
font_01_sfnt_off000078c9.bin
9aaf241b109828081e30af51a9b0ccb4e36a0fd276e2c37658602a13a74197b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C9 10096 bytes

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