Malicious PDF — malware analysis report

Static analysis result for SHA-256 48bc2a2e7ad51cf3…

MALICIOUS

PDF

40.8 KB Created: 2020-08-29 20:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a38ba6c68a62bee69306ca3e1beea9b9 SHA-1: d30380a44651db239a1d6e26f74465e76ba0d0d6 SHA-256: 48bc2a2e7ad51cf318bad9cec20ea02338350b6652718e2e49f4e6b48bcca5e3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=marty+cagan+inspired+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier also strongly flagged this PDF as malicious.

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=marty+cagan+inspired+pdf
    • https://cdn.shopify.com/s/files/1/0437/3538/4225/files/b_s_shah_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/94388563179.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/relays_with_forcibly_guided_mechanically_linked_contacts.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2126/files/best_sites_to_3d_movies_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/antrenmanlarla_matematik_3._kitap.pdf
    • https://static.usrfiles.com/ugd/b8c837_dacb405f5c0948269e918c9157dbddd1.pdf
    • https://static.usrfiles.com/ugd/b8c837_415bde64a0bc42d9af62f05bd185224d.pdf
    • https://static.usrfiles.com/ugd/b8c837_60789c81462d4bb8a0df1d37f5782e56.pdf
    • https://static.usrfiles.com/ugd/b8c837_972a347c37134841bd889e0d19d56688.pdf
    • https://static.usrfiles.com/ugd/24853a_921dbbdeb80e45b3946d4828a64d5d06.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fd0bdb4ea354122ab036d196f5a9c5b.pdf
    • https://static.usrfiles.com/ugd/07625c_ee72d8d1c27445a4bf3b55dcdfac3826.pdf
    • https://static.usrfiles.com/ugd/5b604d_94384c141dc34d048f8e5d52a9ceb21a.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11147191401.pdf
    • https://cdn.shopify.com/s/files/1/0454/7464/4120/files/robotica_para_nios_de_primaria.pdf
    • https://cdn.shopify.com/s/files/1/0437/4095/4773/files/press_brake_manual.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_off0000617d.bin
d34cbe7bcec1737939141e3e79f61216f7ff14b389d17fba160df79cedcda2d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x617D 5396 bytes
font_01_sfnt_off000073f7.bin
8e5f60e7c8398ded8b449a33987de85d2dfe6ad80f439a6b8c42f9f52964b9bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F7 10156 bytes