Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9737f1de0115d4d…

MALICIOUS

PDF

43.0 KB Created: 2020-08-15 06:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9237a7a81e47e5aa19f180823b085aeb SHA-1: 8a4817b0ba81926e1026c75a93f138de209900f5 SHA-256: b9737f1de0115d4d330d1e4023a26b8a90f35bc92946a7c75cdf6fed1937a164
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=frame+bicycle+size+guide', which is flagged as a malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely leading to further malware downloads or phishing attempts.

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.cc/pify?keyword=frame+bicycle+size+guide
    • http://files.calgarymarketingagency.com/uploads/1/3/1/3/131383045/3704894.pdf
    • http://files.randalldavidsonmusic.com/uploads/1/3/1/3/131381677/xidog.pdf
    • http://files.madebymikky.com/uploads/1/3/1/4/131482828/4463411.pdf
    • http://nezopuvan.urbanfood.org/uploads/1/3/1/0/131069915/eb3f3d.pdf
    • https://cdn.shopify.com/s/files/1/0437/8247/1837/files/94485262691.pdf
    • https://cdn.shopify.com/s/files/1/0433/9164/7894/files/kizezutaxuvame.pdf
    • https://cdn.shopify.com/s/files/1/0429/4243/1395/files/91255547921.pdf
    • https://cdn.shopify.com/s/files/1/0432/9937/3214/files/anthropology_optional_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/nawap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5148/2278/files/lagilifidigopunu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4977/1430/files/twilight_life_and_death_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdf
    • https://cdn.shopify.com/s/files/1/0454/6635/3814/files/vejofimawujifita.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7755/files/restsharp_download_file.pdf
    • https://cdn.shopify.com/s/files/1/0440/9825/7048/files/66352077487.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1832/files/35129592765.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_off000069b9.bin
bff8969c46c6a2c603bda86658b6119cdd54d0cc83a328f6058e1bb2e690d103		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B9 5504 bytes
font_01_sfnt_off00007c60.bin
e0e0c7a60d32e6d702a1fb4c6111ecc316d92323a180599b1162c0d5c7a339da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C60 10068 bytes

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