Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dafec147622b50f…

MALICIOUS

PDF

70.0 KB Created: 2020-11-25 18:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76db1be95629cb8ff947ac7fc037001a SHA-1: 535c16f67daaace09cb30c651f4b1e18f7b0bb51 SHA-256: 0dafec147622b50ffe5060d92bcc37009a7639af7a4484d501fc5dcede9b2c5f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a video game trophy guide lure. The PDF also hosts a large number of external links, suggesting a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to drive traffic to malicious sites or host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/strik?utm_term=darksiders+3+ps4+trophy+guide
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5f978b08d6da5.pdf
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f97983d35ba4.pdf
    • https://gurogujanesoxub.weebly.com/uploads/1/3/4/5/134506981/98652a.pdf
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/pufaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jafujasiwetid/whittemore_durgin_coupon.pdf
    • https://uploads.strikinglycdn.com/files/f142ded4-4434-45f2-8d64-cc8e115d82b5/10_days_to_self_esteem.pdf
    • https://uploads.strikinglycdn.com/files/80354534-b6a8-42a1-9f5f-70941aa988ea/devukenazewo.pdf
    • https://uploads.strikinglycdn.com/files/e76d112e-58ff-40c7-a15f-f3cf4d39f6e8/minecraft_2d_games_unblocked_at_school.pdf
    • https://uploads.strikinglycdn.com/files/b3137832-3de2-469a-b8ed-b220eff57c68/3901085389.pdf
    • https://uploads.strikinglycdn.com/files/6d2fdc9a-4db7-4de6-bf1b-6e91d876080d/sijinuwesejevaduzivilu.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/big_little_lies_imdb_parents_guide.pdf
    • https://uploads.strikinglycdn.com/files/8e1b59fc-ed62-4bfd-aa28-384fa7c46208/woods_50009_timer_manual.pdf
    • https://uploads.strikinglycdn.com/files/b23fc506-0bbd-4870-b42f-5e2984fe8d74/jakewejira.pdf
    • https://uploads.strikinglycdn.com/files/2b24e2ca-069a-48b2-b351-365cd3ff518a/pofurej.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_off0000c6e2.bin
1a55e2b3baa203acb18d8ce916b4e66ebc0d7c8cf6ee9e9d8415a2094114d734		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E2 5380 bytes
font_01_sfnt_off0000d95e.bin
f1b5d75a2f4ecc2c4db7d7b503d47b7e012cf9844cac6fb5f3341178e4519770		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD95E 10476 bytes
font_02_sfnt_off0000fd13.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD13 4324 bytes

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