Malicious PDF — malware analysis report

Static analysis result for SHA-256 173f9a6f0c3cb705…

MALICIOUS

PDF

67.6 KB Created: 2020-08-06 13:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4e4f688b3c2d90009d494e1a30c02fe SHA-1: ab1af8263c7c86eb30d81556be1177cbb03f06ad SHA-256: 173f9a6f0c3cb7055573088429b865f03ced51bca37805ada0512548055b9bd0
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=adobe+pdf+pro+trial', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'adobe pdf pro trial' and a list of Shopify URLs, suggesting a lure to download or access malicious content. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=adobe+pdf+pro+trial
    • http://files.essentoilcoverup.com/uploads/1/3/1/3/131383753/6108a3972d07bb.pdf
    • http://files.geekygiftbaskets.com/uploads/1/3/2/7/132740525/refezu-fojizudi-wodujejag-lugugerubateg.pdf
    • http://files.thekindesthing.com/uploads/1/3/1/3/131383493/kojofotufavagat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/gupaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/fezejexunobotolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/41245369217.pdf
    • https://cdn.shopify.com/s/files/1/0437/3708/8154/files/wow_classic_robe_of_winter_night.pdf
    • https://cdn.shopify.com/s/files/1/0432/3642/5883/files/dibixisipidis.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/68463229597.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/nugevogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/64188791337.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41557636134.pdf
    • https://cdn.shopify.com/s/files/1/0429/3319/0823/files/24210229563.pdf
    • https://cdn.shopify.com/s/files/1/0440/1525/5710/files/eichmann_in_jerusalem_free_download.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d15.bin
74e325cdc849740ba8db162662155cac5ca56dcdf2478bcc408f9c0d9ee02ee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D15 30516 bytes
font_01_sfnt_off0000a8aa.bin
b88c84dd97480e965931b6e3fe2139e44438e3cbf4baaf32038f7f920fb80c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AA 4668 bytes
font_02_sfnt_off0000b88e.bin
db39362897d600ff7a85a267fcc6794badb1489e2c908ba6959e5779dca8002c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB88E 9928 bytes
font_03_sfnt_off0000dac2.bin
a24b379294965881213f6bc3e9db9f5314a2d8a06b10cd027b2e5f3c9ddd95e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 16488 bytes
font_04_sfnt_off0000f150.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF150 4324 bytes

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