Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31516e9ed2f3752…

MALICIOUS

PDF

64.5 KB Created: 2020-08-23 05:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff34fe50a0a9f4981d37ee7a4b704da2 SHA-1: 1ce478f685034e6e9202958efc8418512b6cb336 SHA-256: b31516e9ed2f3752e9a91c92f6fe7d3121618c169e8143fa42dfd68974cf8fb8
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, many of which point to external PDF files hosted on Shopify and other domains, suggesting a link farm or SEO poisoning tactic. One of the primary links directs to a known malicious redirector at 'ttraff.com', which is likely used to obscure the final malicious destination. The document body, though partially corrupted, contains the text 'Tropical rainforest food web worksheet', indicating a lure to entice users to click the malicious links.

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=tropical+rainforest+food+web+worksheet
    • http://files.nomadperspective.com/uploads/1/3/2/6/132681632/523a9a51cce.pdf
    • http://files.naturalenvironments.net/uploads/1/3/1/8/131856185/6328850.pdf
    • http://files.weskimo.com/uploads/1/3/0/7/130739076/433066f0b9f7fc.pdf
    • http://jegomut.calmlakefloats.com/uploads/1/3/2/6/132696323/gupelabewet.pdf
    • https://cdn.shopify.com/s/files/1/0437/8663/3377/files/tibowufekilelevolimamur.pdf
    • https://cdn.shopify.com/s/files/1/0436/2895/3763/files/agatha_christie_and_then_there_were_none_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/18245901317.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/zaxugipokipiban.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27588499931.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/chennai_express_movie_mp4_for_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/88675407078.pdf
    • https://cdn.shopify.com/s/files/1/0440/3403/1766/files/que_es_septoplastia.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a67f.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA67F 2828 bytes
font_01_sfnt_off0000b07a.bin
d3af5756a45c36971c51695c17d8f920a26dd2af92aa3e9625f354474e2182de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB07A 5276 bytes
font_02_sfnt_off0000c260.bin
be98d4380c81dcdfea3878ff1d61af3d20531108b26bab1c08f242bcb8b82da1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC260 9904 bytes
font_03_sfnt_off0000e439.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 4324 bytes

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