Malicious PDF — malware analysis report

Static analysis result for SHA-256 923e686686a2bafd…

MALICIOUS

PDF

36.7 KB Created: 2020-08-31 00:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63fc4d9cbbcfee888f22c1d7ef045006 SHA-1: 4f592f853beed91d868fde92340456fb5e39bd28 SHA-256: 923e686686a2bafd12093e923ba13a79f1bf82b1e616074c9c89dda5e0ec3773
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=descargar+wilcom+embroidery+studio+e'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous links, with the primary one leading to a Shopify domain. The document body contains garbled text but includes the same malicious URL and several benign-looking PDF links, suggesting an attempt to manipulate search engine results for software downloads, with the primary link acting as a lure.

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/wix?keyword=descargar+wilcom+embroidery+studio+e
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/jakiziloxepotawetugag.pdf
    • https://cdn.shopify.com/s/files/1/0432/8200/6171/files/le_cassoulet_de_virginie.pdf
    • https://cdn.shopify.com/s/files/1/0437/2394/8183/files/93227439071.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/nopawipumiwudujeset.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/92864351445.pdf
    • https://static.usrfiles.com/ugd/6f58fb_782502c422f84406aede6bf3eeb53fb9.pdf
    • https://static.usrfiles.com/ugd/1ee69b_e337a916164c4159b7dc2db0be4f617c.pdf
    • https://static.usrfiles.com/ugd/b48b60_39539e86a0cc480ab40302ae6cf9b2f2.pdf
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/artificial_intelligence_lecture_notes_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/24315261825.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4338/files/after_effects_cs6_shortcut_keys.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1960/files/capture_one_pro_size.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/39448015751.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2105/files/68912999976.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_off0000501e.bin
025e9dd52d6382416ed37328c4fbd3175da4544c4fdede571842342d8489ad03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x501E 5592 bytes
font_01_sfnt_off00006318.bin
227477625e76e35fe949fc5bd3a255f0a2b1c770dad6e022c144d65bdac7e6d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6318 10232 bytes

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