Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef3090bed7220c3…

MALICIOUS

PDF

47.5 KB Created: 2020-08-04 09:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73c7b3eb6a25bdeae372b9311f58a307 SHA-1: 30d6e9884b316f4c961aa93d1b48b747f50df6b9 SHA-256: cef3090bed7220c3cc284c752c2737464c6c315ef7d770fc503c28c1f79f3000
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector at `ttraff.cc`. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to drive traffic to this malicious redirector. The presence of numerous links, including the malicious one, indicates a likely attempt to distribute further malware or phishing 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=book+for+synonyms+and+antonyms+for+competitive+exams+pdf
    • http://files.wiseguyofficial.com/uploads/1/3/0/9/130969545/duxufonizesuzu.pdf
    • http://files.jacksonchapelumc.org/uploads/1/3/2/6/132695517/4047053.pdf
    • http://files.narwc.org/uploads/1/3/1/4/131453081/532bee2385718.pdf
    • http://files.lilibarbieri.com/uploads/1/3/1/3/131398134/zafukasetoj.pdf
    • http://files.innovationsbuildingservices.com/uploads/1/3/1/4/131438741/3ca2f8128cf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/66682525483.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/the_boyfriend_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/baxipuwapasudipuwumut.pdf
    • https://cdn.shopify.com/s/files/1/0436/1040/7069/files/lajexadiju.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/icom_ic-_7000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/torivevita.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/roxev.pdf
    • https://cdn.shopify.com/s/files/1/0440/3917/6342/files/club_car_troubleshooting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rikujolam.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/soxudafizuxubolekur.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/jozuje.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/detejenuwimomev.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1827/files/98647770053.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/1931864635.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_off00007a83.bin
44c56685e3ca55349f60eb3ac0fea96c8de249562c57f8eaf29a67780e0800bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A83 5612 bytes
font_01_sfnt_off00008da0.bin
6eea397a67066c95d91e0950a7f05f79c9d99377887b295d9a9963858cee981c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA0 10180 bytes