Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0bb2f24fff3b35…

MALICIOUS

PDF

42.6 KB Created: 2020-08-10 18:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aec873358a15556f1423fa9d7c9eca7b SHA-1: 4095fe8fc2d99cb513aa2ce025a5274844b5d69c SHA-256: 4c0bb2f24fff3b35c22dd6e0bd2004c0b276787ff139e2d529a16aa3d1e89679
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDF files, indicating a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as a lure or initial stage for further malicious activity. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text and a reference to the malicious URL, suggesting it's a lure document.

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=bahima+empire+pdf
    • http://files.yourdayweddingsindiana.com/uploads/1/3/2/6/132681482/8865592.pdf
    • http://files.lakeeriefishingderby.com/uploads/1/3/0/7/130740073/1847694.pdf
    • http://zudosax.canadafirstacademy.com/uploads/1/3/1/0/131070450/401006.pdf
    • http://files.phase1trackclub.com/uploads/1/3/1/4/131437815/kojufolasazijoda.pdf
    • http://files.moskoslawfirm.com/uploads/1/3/0/7/130740255/698626.pdf
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/27566786727.pdf
    • https://cdn.shopify.com/s/files/1/0440/4297/7430/files/sonipovatiro.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/6077856318.pdf
    • https://cdn.shopify.com/s/files/1/0431/7488/7573/files/bericht_schreiben_beispiel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdf
    • https://cdn.shopify.com/s/files/1/0437/4711/5157/files/22497598179.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/tosikizemotepurobikebo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2377/files/dialogues_apprendre_le_francais.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/63621834537.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.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_off00006a6d.bin
db1e862cc2375ebd04de5d4ea13f664a13430572c3becbf8c6847ea3eaa4358e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6D 5120 bytes
font_01_sfnt_off00007bb8.bin
32ea8e10815583578d282b2a50296fa434cd22e6f40002400fcfdb1b1434a21a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB8 10076 bytes

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