Malicious PDF — malware analysis report

Static analysis result for SHA-256 930d31f2cee7dae8…

MALICIOUS

PDF

33.4 KB Created: 2020-08-31 16:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49e4965a64365b5740dbf4d7b1c97bcd SHA-1: 4552a441071a912867af6d8090c59ea38062f1be SHA-256: 930d31f2cee7dae814bee4e1579b0dcabd7e7b3148af89f1eaa159d5243808d9
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for movie downloads. This suggests the primary attack pattern is to trick users into clicking malicious links. No scripts were extracted, limiting the analysis of further stages.

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/wix?keyword=you+again+movie+hd
    • https://cdn.shopify.com/s/files/1/0433/0441/9478/files/70889175936.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/losesevev.pdf
    • https://cdn.shopify.com/s/files/1/0429/4665/8463/files/26424514734.pdf
    • https://cdn.shopify.com/s/files/1/0434/7111/0308/files/finuzasumarenunawe.pdf
    • https://cdn.shopify.com/s/files/1/0458/1664/3750/files/barron_s_asvab_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6571/2535/files/9405506094.pdf
    • https://cdn.shopify.com/s/files/1/0470/8791/1070/files/i_864_poverty_guidelines_2019.pdf
    • https://static.usrfiles.com/ugd/79cb75_b45b225724e048808dda4fe412d195da.pdf
    • https://static.usrfiles.com/ugd/824332_36b5efb718a24f959902ef4fc4dac069.pdf
    • https://static.usrfiles.com/ugd/599f1c_c54e1c5c82e54590abc80cfbfcb9f095.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_off00004474.bin
fd40f8cf985da6c81f25f7b6844543934f8bfd65f9b9ec1777ebe79db59697a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4474 4956 bytes
font_01_sfnt_off00005539.bin
1fda152bc60228a8e6d24f41cf27d94bd3f39ff6ba0105c4a01da0277080f779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5539 10616 bytes

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