Malicious PDF — malware analysis report

Static analysis result for SHA-256 382deecff44b3ce3…

MALICIOUS

PDF

36.6 KB Created: 2020-08-29 21:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2f8debe7ec092fd0a96f5608b4dff2c SHA-1: 251aaed2e94492d088a5c655b1c113fea8e1467d SHA-256: 382deecff44b3ce3cc179d15aeea4fbb2f049038390f477d2e8a694f0a79a1f4
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a redirector service (ttraff.com). This indicates a link farm or redirection strategy, likely intended to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is a high-confidence indicator of malicious intent.

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=santa+claus+website+naughty+or+nice
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/1519210917.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/zoliromojanadigemewokabov.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7708/files/the_origins_of_ventricular_arrhythmias.pdf
    • https://cdn.shopify.com/s/files/1/0439/1695/1704/files/clash_royale_guide_arena_3.pdf
    • https://static.usrfiles.com/ugd/b8c837_19351ba1901849da88e26b143cfeac5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f454f3447d4a4f27ac240a43d40afa8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_01f2fd2444b2434586ba0b0969919ead.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d459e0df3594179a2af038a8a62afd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_189118df973d460ebb9913db856bfb47.pdf
    • https://static.usrfiles.com/ugd/067ecb_1b986700c9e74453af7593592132a2a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fdb7d79bdff4ada8e030df7de01ffe3.pdf
    • https://static.usrfiles.com/ugd/b8c837_499df2a4183c4540862eb77bcb453d1c.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/83223780145.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/canon_eos_rebel_t5i_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78992801071.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/mibizokutanivufalodabuli.pdf
    • https://cdn.shopify.com/s/files/1/0434/5836/3544/files/porawurufik.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_off00005113.bin
848d582a830f07c21bfbea3d25417ca9cf295a27c3838da32aa9e137293db854		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5113 5500 bytes
font_01_sfnt_off000063c8.bin
6fe5f428c7ff0d634cd411b947853044d9edf769e988164bc95b41da9a042065		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C8 9916 bytes

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