Malicious PDF — malware analysis report

Static analysis result for SHA-256 541811e55b4b5967…

MALICIOUS

PDF

39.5 KB Created: 2020-08-14 13:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42121f650d281e8443801cfe7e8c85e0 SHA-1: b389283a448558bdbfcee11172bdba7cbe1d2099 SHA-256: 541811e55b4b596733ed183d0043b7872d5965c5cad0ec410c880436d77a6bc1
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination, likely for further exploitation or credential harvesting.

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=dwight+schrute+meme+template
    • http://files.freerangebird.org/uploads/1/3/0/7/130776490/xajisokimik_midopafimup.pdf
    • http://files.aprollers.com/uploads/1/3/0/7/130739986/runel_banipemas_rusajevir_mesor.pdf
    • http://files.tirepeaterclub.com/uploads/1/3/2/7/132741045/gexutubivubojijuw.pdf
    • http://files.heatitupandkeepitcool.org/uploads/1/3/0/8/130815213/6072080.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/48339955079.pdf
    • https://cdn.shopify.com/s/files/1/0447/7186/8821/files/complejo_articular_de_la_rodilla.pdf
    • https://cdn.shopify.com/s/files/1/0437/0055/1830/files/drops_of_jupiter_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/interstitial_lung_disease_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/7375/6572/files/ielts_general_writing_task_1_sample_answer.pdf
    • https://cdn.shopify.com/s/files/1/0431/4405/2898/files/77380861325.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/mibokaloziw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dogazuzotefoninu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/45123605864.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_off00005beb.bin
9901a7a150bcd2924f09751ce95472fad4b0712d53a8ea0c2ffe19467c3e4960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEB 5440 bytes
font_01_sfnt_off00006e5c.bin
a447c11f14bb2a291f924fe0e2c396163c206aa9faf2a87b15c2b48a0a497ba0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5C 10288 bytes

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