Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a8df84805a1c54…

MALICIOUS

PDF

53.7 KB Created: 2020-08-07 05:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c360d9593eb3e33858586925a926d1b SHA-1: e53f227a4f064c5336ed9bd60555ad5457d412c5 SHA-256: 53a8df84805a1c54541d7a2d94f8afb3bf964c0ce2b82af4b550363d2263bc46
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or phishing campaigns. One of the primary links, 'https://ttraff.com/pify?keyword=probability+measure+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. No scripts were extracted, and the PDF structure itself is the primary vector for the attack.

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.com/pify?keyword=probability+measure+pdf
    • http://files.orijenniecosmetics.com/uploads/1/3/1/0/131070402/norapu-bejodumu.pdf
    • http://files.swcare.com/uploads/1/3/1/4/131482886/1826168.pdf
    • http://files.mrscooksclass.com/uploads/1/3/1/0/131070178/3420aaff2d6e5.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/adobe_animate_cc_2020_keyboard_shortcuts.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/feral_druid_leveling_talents.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/paxepizuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://cdn.shopify.com/s/files/1/0428/4468/4454/files/72061730664.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/bizetazukubaduxazurul.pdf
    • https://cdn.shopify.com/s/files/1/0432/4127/5547/files/56247579675.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/jawoxodejasilabubugiguki.pdf
    • https://cdn.shopify.com/s/files/1/0447/0043/4586/files/absite_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/8761/8463/files/futugosin.pdf
    • https://cdn.shopify.com/s/files/1/0429/0802/4985/files/18501591186.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/12556317287.pdf
    • https://cdn.shopify.com/s/files/1/0435/1203/7540/files/oxford_translation.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_off00007a19.bin
7ff95d0035e47dc8ffb319ca7c49232c68a3eab2cc28cfbbfee26e1ed580e6f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A19 5432 bytes
font_01_sfnt_off00008c7d.bin
08d07ac43dc63b265924d9746072f31cd088fced066685e6ddb8147b86cbd13d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7D 11208 bytes
font_02_sfnt_off0000b215.bin
daa05148a1a10c87932c3ef35edc818c7877149c0cdf35df75b9ca2398cd9f10
pdf-font-stream PDF embedded font (sfnt) at offset 0xB215 16788 bytes