Malicious PDF — malware analysis report

Static analysis result for SHA-256 e87268ee924631cf…

MALICIOUS

PDF

33.7 KB Created: 2020-08-31 00:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2e376852ae777e04a9329ca379dc6fa SHA-1: 746d9fe2a16c6821ba0b383170c4edc9b9eecfec SHA-256: e87268ee924631cf1e006bcfa35083c13b19ebf677ae01f06e0f09fadea0c263
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to what appears to be a link farm designed for SEO manipulation. One of the primary links, https://ttraff.com/wix?keyword=gta+v+license+plate, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Gta v license plate' and the PDF creation tool, suggesting a lure to a malicious site.

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.com/wix?keyword=gta+v+license+plate
    • https://static.usrfiles.com/ugd/b444d4_ba8db249636c422186068c94950d2f1a.pdf
    • https://static.usrfiles.com/ugd/0bcf16_72aea5e93a3f4030b91cfce98aac0de2.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_664abc8f64d14eb691b7b96c415b3005.pdf
    • https://static.usrfiles.com/ugd/77d535_9f79799449fe4e4fa0f9331ba70454b0.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/64024967715.pdf
    • https://cdn.shopify.com/s/files/1/0434/8575/7606/files/dalejirudikobobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1103/8632/files/91514589853.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/vekefubazusetokidag.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/4350328324.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0011/files/nijek.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6116/files/small_guided_tours_of_scotland.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/25052506756.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_off000047b4.bin
7e5ddce023fe5341acfc520c064fb00375f5666e7cc4319f2cd0ae46a0ff7f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47B4 4924 bytes
font_01_sfnt_off00005892.bin
66104978ffb7431c9fd76395327aa02f2189fdcbfb6ad2f91ce693013748e09f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5892 9972 bytes

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