Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d6293894713640…

MALICIOUS

PDF

78.6 KB Created: 2020-08-10 18:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13a783c4e801b00075ee08f0a5d1143f SHA-1: 09141393388ef574ef3d8c4e6f704bffe2041c0d SHA-256: f6d6293894713640e314c4fbee6de316525c610a9e33d6c080f30c22955285f0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, contains the URL that is also present in the heuristic firings. This indicates the primary purpose is to redirect the user to a malicious site, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=cavitation+in+pump+pdf
    • http://files.reanalysts.net/uploads/1/3/0/7/130775286/ritavaxofibalo.pdf
    • http://files.cybersundayschool.net/uploads/1/3/0/8/130813821/zutiwupobupunufuk.pdf
    • http://files.lifesadaisycakepops.com/uploads/1/3/1/4/131437243/fageku.pdf
    • http://files.neverdonefiberfarms.com/uploads/1/3/1/0/131071157/2004168.pdf
    • http://files.howellinsagency.com/uploads/1/3/2/6/132681352/bidodojib-vadaw-wawilazofuroz-wimejasom.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3834/files/sumipanifiralujutemo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1443/files/fexagegi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/bendable_concrete_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/bubblesort_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/honda_motorcycle_identification_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/87401211581.pdf
    • https://cdn.shopify.com/s/files/1/0431/4061/2262/files/lofefusatemudixijubapa.pdf
    • https://cdn.shopify.com/s/files/1/0439/4047/9131/files/disadvantages_of_logical_framework_approach.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3041/files/nedis.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/daxok.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9648/files/samawuxeniverezogagolowa.pdf
    • https://cdn.shopify.com/s/files/1/0452/5621/2640/files/the_slave_girl_buchi_emecheta_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/0889/1807/files/30543024225.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_off0000f6cb.bin
a7b0ec92b3418ff58a39103130ba61e6b9b65eaffd1a2c221d60c23f37b53637		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CB 4844 bytes
font_01_sfnt_off0001073e.bin
86f47cf7786c15341cd845cd8e02a67ca29d7c7ff4c786994659ba94daf07204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1073E 11360 bytes

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