Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5466f91545b5d3…

MALICIOUS

PDF

44.7 KB Created: 2020-08-12 12:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f73757899069f7cefb705f53f5dc61a SHA-1: c8f4606c9338c3c031021472bf979f8eeccf986d SHA-256: 0e5466f91545b5d33162b9dd7cd52a27ec33f40093611005b4b47ce6e27e4260
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body text, though partially corrupted, includes the phrase "General anatomy handbook pdf download" and a URL that appears to be a lure. The presence of a malicious redirector suggests an attempt to lead the user to a compromised or malicious site, likely for further exploitation or credential harvesting.

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=general+anatomy+handbook+pdf+download
    • http://bisom.20milesaday.com/uploads/1/3/1/0/131070450/sotonib.pdf
    • http://files.rochesterkino.co.uk/uploads/1/3/1/1/131164002/forixamewowipewuguwe.pdf
    • http://sixile.sandringhamgolfclub.org.au/uploads/1/3/0/7/130775732/vuzobanovute.pdf
    • http://guzavuvu.minorcanmayhem.com/uploads/1/3/1/4/131482993/3216519.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/kikawevenememuvisajusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/blaine_county_police_department_lspdfr.pdf
    • https://cdn.shopify.com/s/files/1/0437/6949/5710/files/tazakudugebu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9850/3336/files/wufedikemige.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/duzoxunotopowew.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/zifavubobegesaxabozako.pdf
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/sonic_pi_songs_code.pdf
    • https://cdn.shopify.com/s/files/1/0441/3403/9704/files/47791634447.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/tedop.pdf
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/xotozekax.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_off000063c4.bin
196cdb7ad405c65ed1538ad4e491aaceeb7482decf7d0a896197c445c3c31fa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C4 5272 bytes
font_01_sfnt_off00007598.bin
21aa5d93507700031649b15dd56ff7337d003f8783c6400f499f1b2913d6116c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7598 10072 bytes
font_02_sfnt_off00009815.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9815 4324 bytes

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