Malicious PDF — malware analysis report

Static analysis result for SHA-256 325de031a3a5bf32…

MALICIOUS

PDF

43.2 KB Created: 2020-08-21 11:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 790885c0b73c26adff971cd5368a8a95 SHA-1: 5797402bfb0e13ccb0b92ca76bbc4d05327b3dee SHA-256: 325de031a3a5bf32f2f15958ddf34aabc2d29a9fb06bb8654319b051ea5e962e
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, suggesting a link farm or SEO poisoning tactic. One of the primary links, 'https://ttraff.ru/pify?keyword=apa+manual+online', is flagged as a malicious redirector. This indicates the document's purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact payload.

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=apa+manual+online
    • http://kevade.paragliding-in-interlaken.com/uploads/1/3/1/3/131398278/e1d55d2a61aa.pdf
    • http://files.petebinderministry.org/uploads/1/3/0/7/130740207/davufis.pdf
    • http://files.milanibowhunting.com/uploads/1/3/2/6/132681865/fetijelajuzuzo.pdf
    • http://lifujete.sugarmillpta.org/uploads/1/3/1/4/131482933/987316.pdf
    • http://gefad.bigcreekkennels.com/uploads/1/3/0/9/130969742/387c9b5f5f07.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/wezasetapokuluf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/77343648892.pdf
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/jovaduv.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/49229182565.pdf
    • https://cdn.shopify.com/s/files/1/0438/2621/7120/files/72948192278.pdf
    • https://cdn.shopify.com/s/files/1/0441/3957/7496/files/burapired.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/70709524535.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/daedalus_wallet_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/17937358947.pdf
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/mammoth_weather_howard.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_off00006d8f.bin
ebcc51deafb95c3bf20536a4cd5da49289d488b0446194fee6a27d338fa4d5cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8F 4680 bytes
font_01_sfnt_off00007d62.bin
3e0831e1b87a8cd7bb533dcda6ee618e136701a7c9d6546957d6a858179bae48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D62 10120 bytes

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