Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd513e3ca489add3…

MALICIOUS

PDF

48.3 KB Created: 2020-08-12 03:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87e28e049ef73b48cca91b6cee3b00a0 SHA-1: 892b1d03985c5d02b26e7ec0d0d5588bc1681def SHA-256: bd513e3ca489add3715ce06422bb665333cee707c2b4f5ae438d36d7cfac22f1
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the URL that leads to this redirector, suggesting the document's primary purpose is to redirect users to malicious content. No scripts were extracted from this sample.

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.ru/pify?keyword=how+to+improve+email+writing+skills+pdf
    • http://files.coj-online.com/uploads/1/3/1/4/131483184/1190320.pdf
    • http://files.glacialpark.org/uploads/1/3/0/7/130776511/3755455.pdf
    • http://files.english.romekjanowskisvd.pl/uploads/1/3/1/3/131383959/6758215.pdf
    • https://cdn.shopify.com/s/files/1/0445/2201/2831/files/88800983135.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/voxularivuxemakida.pdf
    • https://cdn.shopify.com/s/files/1/0432/0709/8529/files/temadopajimarapanezizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/femukafik.pdf
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/xitoge.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/drdo_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/vumeluni.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/42196481392.pdf
    • https://cdn.shopify.com/s/files/1/0429/0805/7759/files/microsoft_wireless_keyboard_1000.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6730/files/lru_cache_python.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/mesazifove.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_off00007cd5.bin
fc09211e7295006fc2aee6d5de9da223c0d7e435a57660e8045d5b81c1300843		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD5 5540 bytes
font_01_sfnt_off00008fa3.bin
cce88cb5ace5bdfaececfb2b98899de32fbdfd7fa87a8528e3af93b80640fb00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA3 10748 bytes

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