Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb39982af8fec83…

MALICIOUS

PDF

45.3 KB Created: 2020-08-23 22:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61b5d463bd9dec4b7c6d8ee96345e32b SHA-1: 293eb8b410db6bde2e9485224ba830ca4004b27a SHA-256: 9cb39982af8fec83a068942bb11c3a19f5d7590d7c6bd4d6204fe90bb7bbd771
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=evaluating+expressions+worksheet+math+drills'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0432/5857/7046/files/82935966106.pdf'. The document body, though heavily obfuscated, also contains these URLs, reinforcing the attack pattern of redirecting users to potentially harmful content.

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=evaluating+expressions+worksheet+math+drills
    • http://files.mylidiasfamilychildcare.com/uploads/1/3/0/7/130740011/jogoxoxuxuzeloden.pdf
    • http://files.manuelarossini.com/uploads/1/3/0/7/130739202/kemufanegir.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/82935966106.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/loloparoxen.pdf
    • https://cdn.shopify.com/s/files/1/0433/4419/9829/files/c_programming_multiple_choice_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1314/files/h_m_uk_new_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/8446104366.pdf
    • https://cdn.shopify.com/s/files/1/0436/0346/0259/files/depuzuxebutafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/19841104355.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/nexofijeninupokirela.pdf
    • https://cdn.shopify.com/s/files/1/0435/1298/7802/files/7452262058.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/20808182822.pdf
    • https://cdn.shopify.com/s/files/1/0432/0369/0660/files/the_stoner_s_cookbook_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/68188115871.pdf
    • https://cdn.shopify.com/s/files/1/0436/0568/8483/files/dikufojejunijo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/marital_settlement_agreement_template.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_off00007468.bin
6f4826f976c4a42249b2f243cdc0cce52daac6d560dcf3882e7b729ea104b71d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7468 5612 bytes
font_01_sfnt_off00008769.bin
ccea4c2e5c87a80577719a710aef5bbd1eb191d284aadeefb5f5a32819cc26de
pdf-font-stream PDF embedded font (sfnt) at offset 0x8769 9572 bytes