Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c64a86561ab609…

MALICIOUS

PDF

42.1 KB Created: 2020-08-23 19:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8a02c4e3475c6126bd6b6e5a848ac27 SHA-1: ff453ac5067bd06e5065c7a68b89fb43c2f9b7e1 SHA-256: c9c64a86561ab60960b1c25d84aabc8582e359f3549f61136d2b75e04b188431
150 Risk Score

Malware Insights

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

The PDF file contains numerous links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify'. The document body, though partially corrupted, suggests a lure related to 'Evaluating expressions practice 8- 4 answers', aiming to trick users into clicking the malicious link. The presence of multiple Shopify-hosted PDF links indicates a link farm strategy to obscure the malicious destination. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=evaluating+expressions+practice+8-+4+answers
    • http://files.henrytyrrell.co.uk/uploads/1/3/2/6/132680852/fuseduwu_piwerisowewosi.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/53381817980.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizuvesadumewagetikuxumut.pdf
    • https://cdn.shopify.com/s/files/1/0448/6584/7458/files/matplotlib._use_agg.pdf
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/makexub.pdf
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/kiwujobisajur.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/17826749349.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/ldc_answer_key_2020_9_sep.pdf
    • https://cdn.shopify.com/s/files/1/0439/0758/0072/files/tarzan_cartoon_movie_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59526866216.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_off0000581b.bin
2999f2e32213384ccf95c60b069a4a224ae180b475c939e4d35e44db6ddb25a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x581B 5476 bytes
font_01_sfnt_off00006ae8.bin
8f11a3b1f831043acb677514e6e0801d368ad7e7c91b2dbe40d7285a044b7206		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE8 10068 bytes
font_02_sfnt_off00008d5c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5C 4324 bytes

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