Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ddfe2698cd52902…

MALICIOUS

PDF

66.2 KB Created: 2020-09-01 05:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0cb340619163bf6f916bd8e9ece3777 SHA-1: 7437dba3ce1b0d262dc6f16c6d44d2c0e00dac3e SHA-256: 5ddfe2698cd52902f508cc75561984dcaf796d396b7519d68f2718fb9f1f6b42
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to a malicious site. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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.ru/wix?keyword=ema+type+ii+variation+guideline
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/rikamuzipifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/tamesexoxetomaxunasozawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/32316605703.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8912/files/82561905307.pdf
    • https://cdn.shopify.com/s/files/1/0447/8294/4405/files/shazam_music_er_app.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/jofib.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/71091138549.pdf
    • https://cdn.shopify.com/s/files/1/0439/9231/8110/files/xakenu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/sabek.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/cisco_ccna_routing_and_switching_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/geometry_g_reflections_worksheet_2_answers.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8a150c37262438780fc918b9154f90a.pdf
    • https://static.usrfiles.com/ugd/89c6ad_e333349be3f542b8a20073923cdcd07e.pdf
    • https://static.usrfiles.com/ugd/455f95_dda0a09f6b7f4a50aa1ccf071f06c8d8.pdf
    • https://static.usrfiles.com/ugd/f84671_7d7155a8ea5a4121877ad6a55eec6f88.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_off0000b8ee.bin
674fbffae6d39324a0981260e1843900f0bd76bfc62cf14ac3153a5b1df7acce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8EE 5104 bytes
font_01_sfnt_off0000ca3d.bin
9c46756ad8320ac06ca3a5e6bf0621a157e05f4066a913bc48268145ec55e421		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3D 10268 bytes
font_02_sfnt_off0000ed43.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED43 4324 bytes

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