Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0889b398707d84…

MALICIOUS

PDF

63.9 KB Created: 2020-09-19 23:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41d7abe95022435ccd775c5d4a2a095a SHA-1: 07b3734a23370fa33255690ce00dcf6b05252a5b SHA-256: ba0889b398707d84e869d8fba5cfa9ab9b7621405fc314bb576a54c0b7db8aaa
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a high number of embedded links, many of which point to a redirector service. The primary redirector URL, "https://ttraff.link/wix?keyword=windows+9x+download", is flagged as malicious and likely serves as a lure for users seeking old operating system downloads. The document body, though heavily obfuscated, contains this same URL, reinforcing its role as the main lure. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to increase visibility.

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.link/wix?keyword=windows+9x+download
    • https://14fec5c5-2eac-40b8-9f84-e415a7aa3cf7.filesusr.com/ugd/808cd0_736614e0c9c8446da9a7ac0a5264cb48.pdf?index=true
    • https://7051b235-84c3-449b-9722-6dbd92568b5d.filesusr.com/ugd/54dfea_24abb7bcedad477285e6993749ca9945.pdf?index=true
    • https://62624e47-4aee-444b-b139-82de88947081.filesusr.com/ugd/b42fd6_2457d535bfb5432da8dcdb008481b2ba.pdf?index=true
    • https://13e7f8fb-8ed2-4a67-b3b9-71b7a1580853.filesusr.com/ugd/b6aaa0_25afa13e379847da95c6dc15b87c90fc.pdf?index=true
    • https://14eb733f-035f-4a0f-81bb-4a342f779b2e.filesusr.com/ugd/1f5cef_d97ad8b7bfcb4be7ad03af19fe98d1cd.pdf?index=true
    • https://bd15334f-1d2c-49c0-854e-2b48115675ea.filesusr.com/ugd/ca847e_2fe7486f865f4e87aec864b0b5880118.pdf?index=true
    • https://324321a1-742d-40ef-b7fe-85e218510179.filesusr.com/ugd/12745a_20102d4ffab84ffba5296d696d41045d.pdf?index=true
    • https://04b16162-c292-46c0-a0bd-a043d1b3daed.filesusr.com/ugd/efb3f0_7ed89a93bd0348e3b0b5c4249f7cc11e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/50004395748.pdf
    • https://cdn.shopify.com/s/files/1/0437/8191/4781/files/celulas_falciformes_en_bebes.pdf
    • https://cdn.shopify.com/s/files/1/0439/3431/8760/files/73689733496.pdf
    • https://cdn.shopify.com/s/files/1/0441/1283/8808/files/71650677121.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/aviation_safety_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/33708627105.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/hobson_vs_hansen.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_off0000bae6.bin
b4f15697ce1f91f78d6a482b7fb4e10bfbd73cf095f5c1a791cc17b05aacd374
pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE6 5052 bytes
font_01_sfnt_off0000cc42.bin
fdf0252d069ffe842be542439747b6e064092c68f22aced877c24dac6102f18e
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC42 11324 bytes