Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ce7a2e991aa46b…

MALICIOUS

PDF

52.4 KB Created: 2020-09-02 01:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c7cae56ffaabb0d67166024186ce465 SHA-1: 02cddb84279bd8d3bf8343f448779f474dbee534 SHA-256: 75ce7a2e991aa46b86c91fe16164a367359e0b45b362b07681323e955c45a41d
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a common tactic for SEO link farms and redirector abuse. The primary malicious URL, 'https://ttraff.club/pify?keyword=full+form+of+bfs', is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious infrastructure, likely as part of a phishing or scam campaign.

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.club/pify?keyword=full+form+of+bfs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/24deb6_48c62fabfa944e7ca9d5c97bb4b537b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9205e142f72a4937a5e236e07320cc8b.pdf
    • https://static.usrfiles.com/ugd/10b11f_36abc0749cf74c80a9eeb757efa01f73.pdf
    • https://static.usrfiles.com/ugd/756799_19c4e2c08fdc4509a348a87639e9bdda.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4a94a6ddf6d452cbc41c039b8f8e669.pdf
    • https://static.usrfiles.com/ugd/defdb4_50ade126cb3145a48530693bc0fc69a5.pdf
    • https://static.usrfiles.com/ugd/e5412a_a36b8d4601fe43558b2a1b13835db2bb.pdf
    • https://static.usrfiles.com/ugd/217b8a_08aacde5667b4034ae6c775661be82fc.pdf
    • https://static.usrfiles.com/ugd/67f5f7_4c3f44c0e6ac49aabe94f8e587425874.pdf
    • https://static.usrfiles.com/ugd/cc03df_9cd1356752ee4216bd5e873c1fbfbd26.pdf
    • https://static.usrfiles.com/ugd/6166c9_a46f4537a6c34dc3be03918546a236e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_012c1a48c59c4d30b027a1d7a6c9ffdf.pdf
    • https://static.usrfiles.com/ugd/2f7815_bb72ae996be94b979facdcefec32b3f4.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/descargar_revista_arqueologia_mexicana_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/32954634132.pdf
    • https://cdn.shopify.com/s/files/1/0458/0163/6006/files/laromularimos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1147/files/riwelojevudiduzatuwivazob.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/sugixavagoviveboxilotofoz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a4c.bin
49f6014fa0019fa381e76d7f645444e1c2accd11e361f8bc988c1f8d151ac5dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4C 4800 bytes
font_01_sfnt_off00008a87.bin
5f611a65accc010fe3131c1af9e3551e4efc10c2324ecb11c538e07e8359d0f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A87 10608 bytes
font_02_sfnt_off0000aece.bin
1aa033920e56302e18a44f2ba9193296e166d79a16766139c5de7f327c3393bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAECE 16180 bytes

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