Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b24659a800ffd9…

MALICIOUS

PDF

46.8 KB Created: 2020-09-02 05:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97743a2f79520402880a018f19c6bfe4 SHA-1: b730a14d13aca2ba133e2bc13defbb51afef2338 SHA-256: d4b24659a800ffd9a5319c17a1e955068cd8d6edaf2918608a397930f7533421
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 pointing to 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text but includes the primary malicious URL and several other Shopify URLs, suggesting a lure to download further content or be redirected to a malicious site.

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.ru/wix?keyword=autograph+2010+bengali+full+movie
    • https://cdn.shopify.com/s/files/1/0440/0293/4942/files/vevarajasasamivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9878/files/wifi_booster_easy_connect_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/interventional_cardiac_catheterization_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/2140/1237/files/dodatide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/ib_biology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/sogixapuravekuluvijafagud.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/headway_beginner_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/9545/7946/files/8187723892.pdf
    • https://static.usrfiles.com/ugd/b8c837_39b5926b6d2743f98b7495f268de3080.pdf
    • https://static.usrfiles.com/ugd/fd30ac_8cbdd790bd0a4b69946977222742163a.pdf
    • https://static.usrfiles.com/ugd/ce77c6_5e63c9584d2b4b5f95bfe49d30f2e7e1.pdf
    • https://static.usrfiles.com/ugd/55e2c6_3f03922f9e344b51b926b2d776deafca.pdf
    • https://static.usrfiles.com/ugd/374ce0_ac8a7763cb4b434dbe86eb9c19e40352.pdf
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/rovonigomewuwogame.pdf
    • https://cdn.shopify.com/s/files/1/0429/8378/4601/files/79523649644.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_off00006801.bin
5d5a70ead554f3c3ad6749e054025cc8f6e13b36fb0b36be8b18259ede4d4903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6801 5652 bytes
font_01_sfnt_off00007b20.bin
047aeabf3f8baa3afcc94c213f729c0eeb240d5e60992227718b070ef04d82aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B20 16452 bytes

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