Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2d90ebed1eba5a…

MALICIOUS

PDF

50.6 KB Created: 2020-08-17 16:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f7a51ebb39e8a151014da9196025bd5 SHA-1: 1bbbf22b026cee02992768abb2420b1beb38a417 SHA-256: 4e2d90ebed1eba5a13797f10166db2ffcdc92a79b882f0eeeb3dbc6918decbdb
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'. The document body, though heavily obfuscated, contains the same URL and a keyword suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, but one other suspicious domain 'mobilessurvivors.com' was also found. The primary intent appears to be redirecting the user to malicious content via a social engineering pretext.

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/pify?keyword=relaxing+piano+sheet+music+free
    • http://lesezufa.mobilessurvivors.com/uploads/1/3/2/6/132683014/bobelufileron.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0701/files/menuwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4120/files/national_achievement_test_reviewer_for_grade_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/45107029062.pdf
    • https://cdn.shopify.com/s/files/1/0430/9994/7169/files/18162392664.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3323/files/company_of_heroes_2_soviet_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/1203/7540/files/febalenozapelabif.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/35779618940.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/loxutiwijadewafulon.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/nafopizumazaje.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/42263999423.pdf
    • https://cdn.shopify.com/s/files/1/0436/0830/9923/files/35019255078.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/jovutafewububo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/36536384429.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/nobesa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/jimulufup.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_off000073d7.bin
d3e174511920e8c416e7028d64c9abd9a79b2a2dd2661f9f6b00079c52a957b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x73D7 5504 bytes
font_01_sfnt_off0000866c.bin
78ccecd515d1223f25bc53d19711e2fe30a149be8347c3de1d912b3c31fd04be
pdf-font-stream PDF embedded font (sfnt) at offset 0x866C 9912 bytes
font_02_sfnt_off0000a894.bin
b330339415d7fa9c1b652c1fb2a052ec06569061b7b71506ab53161dc9b94742
pdf-font-stream PDF embedded font (sfnt) at offset 0xA894 16100 bytes