Malicious PDF — malware analysis report

Static analysis result for SHA-256 d361f502491cc320…

MALICIOUS

PDF

42.0 KB Created: 2020-08-04 07:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53ff522bb4d30be5267cf881f77ebb7d SHA-1: 0719da8e48781473bf1642a495f7f87a3352ea6f SHA-256: d361f502491cc32073aa7cc9d05a9613ec877802e2ac2de793bedfa8a9371f7e
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'college admission essay pdf' and the malicious URL itself. The presence of numerous external PDF links suggests a link farm or redirection tactic to obscure the final malicious destination.

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.com/pify?keyword=college+admission+essay+pdf
    • http://files.alphasitelogistics.com/uploads/1/3/0/8/130814308/lakilulafuror_xoxubakiwevus.pdf
    • http://files.breakingfreeky.org/uploads/1/3/1/3/131381976/mexibasoje.pdf
    • http://files.designamanila.com/uploads/1/3/1/0/131070483/8686176.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/17668953332.pdf
    • https://cdn.shopify.com/s/files/1/0428/9780/1375/files/aptitude_questions_and_answers_for_placement.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/49508798148.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/41573536221.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23929268289.pdf
    • https://cdn.shopify.com/s/files/1/0438/6593/1936/files/tepupewutiniruragezipi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/97296905174.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/how_to_rename_a_file_in_unix.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/56666460627.pdf
    • https://cdn.shopify.com/s/files/1/0434/3690/0504/files/duvexomorutesadan.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_off0000677d.bin
c3829ffcf91549b138b45904d6a051ca922cb0d67d063d076bea78f4315984b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677D 5272 bytes
font_01_sfnt_off00007967.bin
1518efc842eae499a63e687ceb8d1b8496df87ec4a40eacdb74472cd6527dcb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7967 9948 bytes

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