Malicious PDF — malware analysis report

Static analysis result for SHA-256 939868f5fa28e2d1…

MALICIOUS

PDF

43.9 KB Created: 2020-08-31 09:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8431531ae718fd0588c43c95166db128 SHA-1: d0ca1be7f6fb1e05ba72a64a3566d5043eb8e8dd SHA-256: 939868f5fa28e2d19a585ddd5c7c97651518a8b5851d802ca264253562dab6a1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely intended to host further malicious content. The document also instructs the user to disable security software, a common tactic to bypass defenses. The presence of a link farm suggests an attempt to manipulate search engine results or distribute the malicious link widely. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the exact payload.

Heuristics 4

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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=911+operator+game+trainer
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/bijatawadoxumevoxow.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/jirarizul.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/98177532999.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8197/files/pijamixixegakasebamuzo.pdf
    • https://static.usrfiles.com/ugd/e3834b_333e5f47a46946299e84c0a8b4541582.pdf
    • https://static.usrfiles.com/ugd/b8c837_15861b91b164477fb0af47f3fd67a988.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d6c68ede7ab4d0985bd823f7434ac85.pdf
    • https://static.usrfiles.com/ugd/b8c837_12b032929c1c4d90a34db89513d70f04.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_9d262776552b44a7b6ae9499a9498014.pdf
    • https://static.usrfiles.com/ugd/a467d2_e04ba689c6034996b6282ae3b154aa27.pdf
    • https://static.usrfiles.com/ugd/48f461_6d7b0328534340e3926ac676331b4547.pdf
    • https://static.usrfiles.com/ugd/1c90dc_819dde90b5c348ec94c3f809077db389.pdf
    • https://static.usrfiles.com/ugd/b8c837_d343650d5b8340cc8d85e894b6698886.pdf
    • https://cdn.shopify.com/s/files/1/0434/7805/7122/files/biology_1st_semester_exam_review_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/balancing_redox_reaction_practice_problems_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/27613945640.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/house_gecko_care_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8700/files/md_aftab_ansari_ringtone.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_off0000695b.bin
58cc20f19d2742fc5c127f4bf83c73061c3fd3e682ad10e37268daa4d5513492
pdf-font-stream PDF embedded font (sfnt) at offset 0x695B 5044 bytes
font_01_sfnt_off00007a72.bin
1a9d4520263fea9cbebb32e19019cdc2cc7f80d6aa902df83326487f3058b2e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A72 12448 bytes