Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0f10f1b7be6ee0…

MALICIOUS

PDF

40.9 KB Created: 2020-08-11 01:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 806d648df14196f37a2330a6fd303895 SHA-1: ace9e1293aea3a30a042a042e8759b9b41ed0b1d SHA-256: fe0f10f1b7be6ee0323ec63c03fae09501bb944ffcf33f164245932867c87dda
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 resources, a technique often used for SEO poisoning or to host malicious content. One critical heuristic firing indicates a link to known malicious redirector infrastructure at `ttraff.ru`. The document body, though heavily obfuscated, contains the URL `https://ttraff.ru/pify?keyword=b+d+chaurasia+human+anatomy+8th+edition+pdf+free+download`, suggesting a lure related to downloading a book. The presence of numerous Shopify links, some confirmed benign, may be an attempt to blend in with legitimate content.

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=b+d+chaurasia+human+anatomy+8th+edition+pdf+free+download
    • http://files.leatherandlavender.com/uploads/1/3/0/8/130874125/wumezuso-xenulija.pdf
    • http://ruwifi.myfrontierfoods.com/uploads/1/3/1/3/131383297/dipun.pdf
    • http://files.wildrumpusphotography.com/uploads/1/3/0/7/130776561/bda0b7fe8c.pdf
    • http://files.mylocaldog.com/uploads/1/3/0/7/130775655/733263990d552.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/begin_the_beguine_clarinet_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/24290361485.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0427/files/womevabomex.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/4375608528.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/48104463785.pdf
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/zumilulajejaporukuludu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48465164240.pdf
    • https://cdn.shopify.com/s/files/1/0434/6524/4832/files/rafi_biochemistry_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/essae_ds_451_calibration_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3714/files/convert_to_word_using_macro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005351.bin
635908f3b52a313bf16010a398e0b502e761612efd0e3638d270e5c4642fb2f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5351 5716 bytes
font_01_sfnt_off000066b3.bin
4d79cd44500bdbbb75aa330b71c08d2011284f7ca76da0ceb606aadcb470f4af
pdf-font-stream PDF embedded font (sfnt) at offset 0x66B3 9844 bytes
font_02_sfnt_off00008864.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8864 4324 bytes