Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9d91fbed2fb64d…

MALICIOUS

PDF

43.2 KB Created: 2020-09-12 04:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 573849397037b57f87c25b152ff5e99c SHA-1: 811ff5ce43035ee5583bf42133519133efc60071 SHA-256: bb9d91fbed2fb64d58f7125afd50b4274b26e47e2dfd42ffcad6cf6525076f99
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=android+game+development', suggesting a lure related to Android game development to entice users to click the malicious link. The presence of numerous PDF links also indicates a link farm strategy, likely for SEO poisoning or to distribute malicious content.

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.club/wix?keyword=android+game+development
    • http://files.mylappetbed.pet/uploads/1/3/0/8/130813118/tisukazegad-sizirune.pdf
    • http://vuwomozu.artculturevs.org/uploads/1/3/1/3/131379394/debazemololumobug.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8892/files/5948512795.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2072/files/28088345114.pdf
    • https://cdn.shopify.com/s/files/1/0435/6059/9701/files/security_guard_risk_assessment_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/9743/0941/files/1347480231.pdf
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/tuxabutukazevijazepitita.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/mastering_astronomy_answers_chapter_20.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8068/files/57420013051.pdf
    • https://static.usrfiles.com/ugd/87a178_b44cbdb6f07e42549e29ba487729114b.pdf
    • https://static.usrfiles.com/ugd/d32f78_b3bd00c8935e440290b7c769bfc994a1.pdf
    • https://static.usrfiles.com/ugd/469aea_e1117a4600f34cb4800bd550ed9b405a.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_off00006bb0.bin
7827c6c9ec4eeaf49c4c2ba903b14336ac87d484d7e5e6d720f25ff6d121e4f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB0 5152 bytes
font_01_sfnt_off00007d2a.bin
56c420cf94054e4aaa6d0a90bfc3d08128661e40c16fc1214b7f1ae48fd2b7c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2A 10260 bytes

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