Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a39e34e6c6074f…

MALICIOUS

PDF

35.3 KB Created: 2020-08-01 01:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edec3e463920cdd6c3b3dbda7478308d SHA-1: 76b3cdd136d68e4d5b3940d7f67d035e98b1f46e SHA-256: 72a39e34e6c6074f1464ca391f2674d189e06fdd210fef3f1c66c470cdbabab5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to host other PDFs. One prominent URL, https://ttraff.ru/pify?keyword=2004+ford+f150+owners+manual, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure under the guise of providing a vehicle manual.

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=2004+ford+f150+owners+manual
    • http://files.realisticproductions.net/uploads/1/3/0/7/130738725/1d109daf2b3.pdf
    • http://files.bullswc.com/uploads/1/3/1/3/131380759/finekagepavere-retibeli.pdf
    • http://files.amyplouff.com/uploads/1/3/1/4/131454345/693788.pdf
    • http://files.unitedsingers.co.uk/uploads/1/3/0/9/130969796/0c5609358c2ae9b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5935/4517/files/everstar_air_conditioner.pdf
    • https://cdn.shopify.com/s/files/1/0432/2669/3789/files/67440503132.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/70648336699.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/92765125975.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/videjovefepemagigigefot.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/89851171314.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/70684526054.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7887/files/wovokizutudiduxodagid.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/kakewotanodezuzedum.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/kivawaneredamukitefemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/40229740177.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/lubonixezubusoxu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c29.bin
73f38f0110c22d799ea3be6f865e90783b2d171e00c4cbb9108c4f6fedb9bf5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C29 5588 bytes
font_01_sfnt_off00005f35.bin
50d04cf4e45532f92eef50b894d078f22d0fe8ad18758fb2b670a439dfa3a192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F35 9788 bytes

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