Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e3ba285963fa41…

MALICIOUS

PDF

39.2 KB Created: 2020-08-20 06:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79deb5e1881287d65f886fd52af2c32a SHA-1: 1ccb91e4b4aa160b60a71ca5f31e46359f7f0b82 SHA-256: b4e3ba285963fa41e5bff18e3a520edf60baf587634730c392a5906dd78198c5
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector service. The document body, though heavily obfuscated, contains URLs that are also present in the heuristic findings. The presence of a link farm suggests an attempt to distribute malicious content or traffic, likely leading to a second-stage payload or phishing page.

Heuristics 3

  • 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.
  • 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=eclipse+ide++for+linux
    • http://giwanokog.troop133.us/uploads/1/3/1/6/131636612/fomebagafe.pdf
    • http://files.1201third.com/uploads/1/3/1/4/131483154/kapudomelotuj-nasumalu-zusij-nuludavavedev.pdf
    • http://files.jacintawalshballetarts.com/uploads/1/3/1/3/131398091/ddb7ede299.pdf
    • http://nazowo.baysidechicgalveston.com/uploads/1/3/0/9/130969858/savuzexar_wusameduwevolug_jenegi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1511/6696/files/fenezemagaxezopu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/zhuyin_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/cbest_passing_scores.pdf
    • https://cdn.shopify.com/s/files/1/0448/4156/6370/files/cant_hear_anyone_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0437/4567/3377/files/basalt_rock_fibre_journals.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/93562726962.pdf
    • https://cdn.shopify.com/s/files/1/0436/2600/4642/files/pakisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/48008486048.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/21713519422.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005be8.bin
f075b60d4bb944628b318d0bc6f36f7d240bf68811b8109c495c8bd199610f14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE8 4964 bytes
font_01_sfnt_off00006cdd.bin
4c0e3dbf9bcfb487f8d0351d3dc822b9e682f8494252103b91a34a07a75fe1c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDD 10316 bytes

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