Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72b0d1e3d458fb2…

MALICIOUS

PDF

49.3 KB Created: 2020-07-29 21:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cda35cfe63235930e0091a8fb0e9198 SHA-1: a412cb5c5f9c7c762b344324bf6834c1fb1ef4c5 SHA-256: a72b0d1e3d458fb221a942c8567e5be22ee2fcd9bb1cd73ffd4a2e633644165d
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'esl describing people s appearance vocabulary pdf'. The presence of multiple Shopify links, while some are benign, indicates a link farm strategy to obscure the malicious destination. The primary malicious IOC is the ttraff.com redirector, which likely leads to further 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=esl+describing+people+s+appearance+vocabulary+pdf
    • http://files.montoliva.com/uploads/1/3/0/7/130775825/pemekokixofer-jazigowi-wuraje-mimukolavixu.pdf
    • http://files.nunes-ueno.com/uploads/1/3/0/9/130968956/9a1404c29.pdf
    • http://files.1stonthreads.com/uploads/1/3/0/7/130740517/tafoxijomok.pdf
    • https://cdn.shopify.com/s/files/1/0431/4346/3069/files/79021606361.pdf
    • https://cdn.shopify.com/s/files/1/0439/0171/4587/files/79167925058.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/99237465691.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/49871775291.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/5090259401.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/guzowevekalizagigi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/56615947559.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/72330477044.pdf
    • https://cdn.shopify.com/s/files/1/0435/6059/9711/files/libapukirolup.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/kezuxulun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdf
    • https://cdn.shopify.com/s/files/1/0432/7509/2132/files/vawep.pdf
    • https://cdn.shopify.com/s/files/1/0432/2364/6365/files/jufigizenufiwomelofoluz.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_off000081c8.bin
a68b9218145e11e9b186102fc5e21ff3ab3f3dd7bd336d3f8db784b337aa9ba0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C8 5384 bytes
font_01_sfnt_off0000941e.bin
ed0627ea9774c275d002c3d4502f2740bff6a1eef60c9447e3c34abe1de37426		 pdf-font-stream PDF embedded font (sfnt) at offset 0x941E 10260 bytes

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