Malicious PDF — malware analysis report

Static analysis result for SHA-256 4271a18d0d7e653d…

MALICIOUS

PDF

40.6 KB Created: 2020-09-01 19:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f9fadd147d9b680ed8f5bc2ac7a9901 SHA-1: e0511ad70ffeb17a92fffff9358791cf966fb24b SHA-256: 4271a18d0d7e653d7df555ce236c9e4e1d71f590c41ecf7395eed5d55385c6d1
180 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains text that, when combined with the heuristics, suggests a lure for sensitive information such as recovery secrets or private keys. The primary malicious URL is https://ttraff.com/wix?keyword=break+the+chain+of+infection+pdf.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/wix?keyword=break+the+chain+of+infection+pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/85871157128.pdf
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/46886713786.pdf
    • https://cdn.shopify.com/s/files/1/0444/4743/2871/files/former_global_calgary_news_anchors.pdf
    • https://cdn.shopify.com/s/files/1/0436/4189/7113/files/biometric_device_driver_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/7470/6853/files/kawuvudamajanoxanoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/7331/5740/files/emulator_pubg_mobile_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/6290/2438/files/jevigavarovetesuru.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/nj_6_points_of_id.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9252/files/nutesevowefilakam.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/88675624638.pdf
    • https://cdn.shopify.com/s/files/1/0462/4062/8887/files/cyberark_dna_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4320/0929/files/blankets_graphic_novel.pdf
    • https://cdn.shopify.com/s/files/1/0437/3934/9146/files/stories_the_path_of_destinies_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/tikalakepolanomapudukela.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10588857949.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_off00006190.bin
45c9984d53e7351868d797c88319c81919d8acd401876d4cf2d842684467e3f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6190 5148 bytes
font_01_sfnt_off00007314.bin
c1e34c284c4b97dfe392451b2d5c9d80add76cc00e5a1c62c831976526f31662
pdf-font-stream PDF embedded font (sfnt) at offset 0x7314 10208 bytes