Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5bf79f6261d1283…

MALICIOUS

PDF

44.3 KB Created: 2020-08-09 11:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b37738f7dc08fc7d086b19a8014483e SHA-1: a9e1ee47a2a77bc27fbedcdb0b74315033ab2b08 SHA-256: b5bf79f6261d12833706eccc1f6f26035560f511c2d90b720c77915374512e0c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains references to the same redirector URL and other benign-looking PDF links hosted on Shopify. This suggests a phishing or social engineering attack where the embedded links are intended to lead the user to malicious content.

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.com/pify?keyword=adverbs+of+manner+speaking+activities+pdf
    • http://vifajaxu.verdurette.org/uploads/1/3/0/7/130739704/47cbd64203f21ca.pdf
    • http://files.crclabourcouncil.com/uploads/1/3/0/8/130814430/sotimedobejeg-sokubij-kediwat-dijokemap.pdf
    • http://files.original-items.com/uploads/1/3/0/7/130739348/8722643.pdf
    • https://cdn.shopify.com/s/files/1/0441/2702/7352/files/85027100505.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/83054803111.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/kozoxibawogefowiguxovis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevuwuvufotolotatagonisex.pdf
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/19912151943.pdf
    • https://cdn.shopify.com/s/files/1/0435/2478/4283/files/algebra_worksheets_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/53548328726.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/47705874757.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/nupafibufakeje.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/25000578208.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_off000060d0.bin
eb62edd0377aed6b2b79252f3a9a3c28ef77ea8e91529d07b55d1f21759f9197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D0 5484 bytes
font_01_sfnt_off0000735f.bin
7a3942d9bd04c9ab69d0506df57db5b425f361a8bfa1d235bcdb53260ea42978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735F 10356 bytes
font_02_sfnt_off00009614.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9614 4324 bytes

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