Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dde8692714856f1…

MALICIOUS

PDF

43.4 KB Created: 2020-09-13 10:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00067c9838f3b79f98cc95af234eeef3 SHA-1: 9ead9d4ecd4bc63a9c13133b69ed1b3cbf0cf0f9 SHA-256: 3dde8692714856f1780ad411a4dcdb3626073773a02f1e49ac4be7a421aa39d9
150 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, which points to 'https://ttraff.cc/pify?keyword=nonfiction+worksheets+2nd+grade'. This URL is likely intended to lead the user to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify, which is flagged as a PDF link farm. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=nonfiction+worksheets+2nd+grade
    • https://cdn.shopify.com/s/files/1/0434/8759/2608/files/7687668427.pdf
    • https://cdn.shopify.com/s/files/1/0437/2047/4779/files/parasitic_diseases_of_animals.pdf
    • https://cdn.shopify.com/s/files/1/0428/7060/3932/files/ds2_cheat_engine_item_swap.pdf
    • https://cdn.shopify.com/s/files/1/0431/1043/2930/files/mivezujajawisinimizari.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/56358953826.pdf
    • https://static.usrfiles.com/ugd/4bb894_f6cd6e121e4648de8d0bea1903375013.pdf
    • https://static.usrfiles.com/ugd/10cedf_ebbb89bcdab34bb5983e224880cdc41e.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_a933897a2983439bb5fc0e914bfc5c5f.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0302/files/nobomuwakigi.pdf
    • https://cdn.shopify.com/s/files/1/0462/1788/7898/files/93827885989.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_off00005e3f.bin
84b97f95e1418a4009753aca6f092f20864e8021d465fef85e7bec968dd4a4f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3F 5296 bytes
font_01_sfnt_off0000704f.bin
b0d0b068a03c7a58c0ee67cff944f38c43ab6faa7c0c2266871664dd044b533b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704F 10032 bytes
font_02_sfnt_off000092a3.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A3 4324 bytes

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