Malicious PDF — malware analysis report

Static analysis result for SHA-256 c16c1fb175e57b69…

MALICIOUS

PDF

41.7 KB Created: 2020-08-12 23:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dc07e4071fcbf9c236b68012ed1d3b1 SHA-1: a72793f0a3be10d743d4a2d698a593efeb69c84d SHA-256: c16c1fb175e57b6976af83467e25772baaa583902d9ba4d10f5e5f1874915527
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO spam campaign designed to drive traffic to malicious infrastructure. The presence of the 'incremental sheet forming pdf' keyword in the malicious URL indicates a potential lure for specific search queries.

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/wb?keyword=incremental%20sheet%20forming%20pdf
    • http://files.elainehmacdonald.com/uploads/1/3/0/7/130739916/dajatupapi.pdf
    • http://files.batrssocal.com/uploads/1/3/1/3/131384789/vipibifoxoteroxu.pdf
    • http://files.beautyartistry.net/uploads/1/3/2/6/132695575/vumivej.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/porob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zemeletitofugawekabol.pdf
    • https://cdn.shopify.com/s/files/1/0435/6951/2607/files/99665955762.pdf
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/sawubuvalul.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/16317548246.pdf
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/julovisoletofetovose.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/6437152220.pdf
    • https://cdn.shopify.com/s/files/1/0429/9984/0921/files/becoming_a_better_person.pdf
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/98538778309.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/71466643380.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/96798251147.pdf
    • https://cdn.shopify.com/s/files/1/0435/5316/1367/files/kekikozi.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_off0000655a.bin
39041aea0d25a5a83aef54c3aca0010cc2521204ce1c25579227072604501840		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655A 5504 bytes
font_01_sfnt_off000077d5.bin
8dee629544592d63f03652c160c843679cdf98264ac4f8c1fad8e1162b1ed2ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D5 9944 bytes

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