Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c715dfd72fa6f7…

MALICIOUS

PDF

57.3 KB Created: 2020-08-23 02:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7352c982e40a0d65c7153edce636f13f SHA-1: eb5de58e00b4219b3599a5bdede594ca1a9cf4bc SHA-256: 72c715dfd72fa6f7c86db79a6cbedb94d51223f0a72995f3c96700460e36831c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=list+adapter+in+android+kotlin'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to potentially malicious content. The presence of many external PDF links further supports a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=list+adapter+in+android+kotlin
    • http://wabefe.nnft.ca/uploads/1/3/1/6/131606666/5119180.pdf
    • http://zesomaf.winstonheinrichs.com/uploads/1/3/1/4/131407558/merubabipadijo-nakizevipus-mizuzi.pdf
    • http://files.umdgreeklife.com/uploads/1/3/1/4/131408204/1775977.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/27264901873.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/89793427406.pdf
    • https://cdn.shopify.com/s/files/1/0429/1998/5319/files/pipukuparuba.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4773/files/marcello_bach_adagio.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/change_git_origin.pdf
    • https://cdn.shopify.com/s/files/1/0438/8939/3816/files/50_tons_de_liberdade_grey.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2943/files/adobe_lightroom_tutorials_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/dimadanexafebilifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2711/1841/files/41787420786.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/88901116521.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/79149059027.pdf
    • https://cdn.shopify.com/s/files/1/0428/3010/2694/files/xugonalujoverexiwiso.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/zijopazafow.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/waviwegitajudab.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/bagideposi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e54.bin
59d7c6d9eeb7a96e1990d42b55e7491b55a79ede51be1d5e20342b115630da33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E54 4744 bytes
font_01_sfnt_off00009e78.bin
d96208d5550ad8876df8282535b75c69ef99e712cccccf7e36f0b57d8e70ba3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E78 13384 bytes
font_02_sfnt_off0000c99f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC99F 4324 bytes

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