Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ada9c500ddb56c…

MALICIOUS

PDF

72.0 KB Created: 2020-09-28 17:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d2703c1b29e92a0722d9a15b841ea2b SHA-1: d18796f5dca1f94cb9eb6a18beb70dd1450c971d SHA-256: 95ada9c500ddb56c140f6285d60c770ca8ede66231427deec1bee68667f5f1ac
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to SEO-optimized PDF hosting sites, suggesting a link farm designed to distribute malicious content. One critical heuristic identified a link to a known malicious redirector, https://ggtraff.ru/mozel?keyword=sony+zs-+rs60bt+manual+pdf, which likely serves as the initial stage for delivering a payload. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, reinforcing the lure of a product manual to mask the malicious intent.

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://ggtraff.ru/mozel?keyword=sony+zs-+rs60bt+manual+pdf
    • http://files.miralindaphotography.com/uploads/1/3/0/7/130775398/7197bff1b6ce.pdf
    • http://disim.newageoflight.com/uploads/1/3/1/3/131384429/5b28d76561.pdf
    • http://files.thefilesartsproject.com/uploads/1/3/0/7/130775590/4e5116.pdf
    • http://files.featherpress.org/uploads/1/3/0/7/130775977/a56b501cc.pdf
    • http://files.forzathletics.com/uploads/1/3/0/7/130775145/gawekafowofirifo.pdf
    • http://files.rutoutdoors.com/uploads/1/3/0/8/130874162/b79863.pdf
    • http://files.officialmilag.com/uploads/1/3/1/6/131637055/9219002.pdf
    • http://files.goyevillage.com/uploads/1/3/2/7/132712000/7943797.pdf
    • https://site-1037237.mozfiles.com/files/1037237/70224673457.pdf
    • https://site-1036751.mozfiles.com/files/1036751/wesazazofu.pdf
    • https://site-1036876.mozfiles.com/files/1036876/30537015688.pdf
    • https://site-1036910.mozfiles.com/files/1036910/35336954772.pdf
    • https://site-1036627.mozfiles.com/files/1036627/xolopejekutub.pdf
    • https://bc094cbe-d028-45c7-9265-f2ecdcae2aeb.filesusr.com/ugd/f14cf6_c58210bf33964fad8af85fa11264f849.pdf?index=true
    • https://1419bd42-cf57-4c6f-a2a1-ccacb0426721.filesusr.com/ugd/dad7b5_377702c22dfa422da774b8afa53f6c27.pdf?index=true
    • 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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa76.bin
52693c4fe68fa0889f089ebf5e3c74f0aa005cbf9f309e08f3ed2c27b109eb9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA76 5912 bytes
font_01_sfnt_off0000be81.bin
ecb9b9590988c3ec539913c6993ce2b9fe81e9f4625142bdda3f7e73c7309396		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE81 6340 bytes
font_02_sfnt_off0000d2d7.bin
35898e691aec144eb740513623213d9fd4af566155d974717e7865d4720a43ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D7 10616 bytes
font_03_sfnt_off0000f6ea.bin
35a54816bd36f29d5392db955a8d986fb943efd7a0d0c9c22e6b007f92c2d59f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 9236 bytes

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