Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b1208bfab4acb5…

MALICIOUS

PDF

31.7 KB Created: 2020-08-19 21:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0635db42c3977527849eff5dff8e2f2a SHA-1: 18e9afe81ee92135fe715bda85ae9db4bc69509b SHA-256: 95b1208bfab4acb5f23142f2b39028171d8dee1f6464eca40a48be5aa2b3f93e
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for 'Appa song in tamil video'. The primary attack pattern involves redirecting users to malicious infrastructure via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=appa+song+in+tamil+video
    • http://jozumoj.ourstrongtower.org/uploads/1/3/1/0/131070767/riwiduru_felavifos_koruz_zuwarebof.pdf
    • http://files.kphotoandfilm.com/uploads/1/3/2/7/132710624/5577370.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/adverb_exercises_for_class_6.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/pobupejuruw.pdf
    • https://cdn.shopify.com/s/files/1/0436/5749/4693/files/domoxafibivuwijasulovolej.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0714/files/sedokizim.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/saxukubarujep.pdf
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/c_program_design_for_engineers.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/livre_guide_du_routard_espagne.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/nespresso_delonghi_descaling_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4734/files/bleachers_rollercoaster_m4a.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1411/files/xomeruse.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/50438192971.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_off00004077.bin
3b68fefc0d62edc510f820ed9e1ce0f6b198e33067c66f443e29ade140c482f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4077 5232 bytes
font_01_sfnt_off00005235.bin
1697614bce52e0e7229d51185f5ddfa56db52ef2e2fd7a6762c45cda5b4e8ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5235 9400 bytes

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