Malicious PDF — malware analysis report

Static analysis result for SHA-256 aefbb42687917265…

MALICIOUS

PDF

55.2 KB Created: 2020-08-16 20:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55571474924ae27ef909e444377dd12a SHA-1: 6caedd0908394c39a068f1d5c93c3f8807dddfd8 SHA-256: aefbb42687917265cb4750990df164525e4d6410d62e7fef491f8b0e63b1ad18
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic firing indicating a PDF link farm. One of the primary links directs to a known malicious redirector, 'ttraff.ru', which is likely used to obscure the final malicious destination. The document body text, though heavily obfuscated, contains the string 'air conditioner ppt', suggesting 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.ru/pify?keyword=air+conditioner+ppt
    • http://toxifoxe.myssma.com/uploads/1/3/2/7/132740285/kugamenos.pdf
    • http://sizawako.projectcreatekids.com/uploads/1/3/1/0/131070450/sulunasuza-netunodenimafo-firata-danoxekow.pdf
    • http://files.tbulaw.com/uploads/1/3/1/4/131406826/sokevamiseribuv.pdf
    • http://files.sfagingresearch.com/uploads/1/3/2/3/132302732/2d38ee490b2809.pdf
    • http://sizawako.projectcreatekids.com/uploads/1/3/1/0/131070450/sulunasuza-netunodenimafo-firata-dano
    • https://cdn.shopify.com/s/files/1/0434/3490/1671/files/nipuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/54537404108.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9517/files/vavuziwirafomut.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/gikiluke.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90067119925.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/after_the_love_has_gone_lead_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/6464/0159/files/teforakozijitigimavuxexi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/5671318619.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/coreldraw_graphic_design_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/pojoribiti.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_off00009d81.bin
5a8add2a70604c19b93af48d9028ecb52730e9aa064433e737bf25d7e9cb40d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D81 4636 bytes
font_01_sfnt_off0000ad4b.bin
ba5d6d8ec353130bf8fe0fd10fe5041195cee1ccb30998bf51d58f722d4cb57c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD4B 10232 bytes

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