Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff433f660b45e5d…

MALICIOUS

PDF

47.6 KB Created: 2020-08-14 23:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bd667d6a933dad7279fec440041635d SHA-1: eebcbf436a5e8a931dbd3bb6e73d4cabc455baf5 SHA-256: 8ff433f660b45e5d89fcc066e83ca7e1f499e1f55623d148e486143614283a6c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a lure of a 'Haruspex build guide'. The document body, though heavily obfuscated, contains references to this guide and the malicious URL, suggesting a phishing or malware distribution attempt. The presence of many Shopify-hosted PDF links, while mostly benign, serves to mask the malicious intent.

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.ru/pify?keyword=haruspex+build+guide
    • http://files.teamtruebelievers.com/uploads/1/3/0/7/130739210/0c5284.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8863/files/zydrate_anatomy_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0436/9842/1913/files/adsorpsi_karbon_aktif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/kagom.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/chagas_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0438/3539/2150/files/20007528572.pdf
    • https://cdn.shopify.com/s/files/1/0434/8857/5638/files/37001133147.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/books_for_learning_chinese.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/57897848635.pdf
    • https://cdn.shopify.com/s/files/1/0433/9204/1118/files/2008_dodge_ram_1500_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/57897882484.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/vurofasediv.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9528/files/worekunezibunodavag.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/nikagozolunegalobeninemi.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_off00007d59.bin
fc29ea0082c228cdd785e42b9778c744e49181e043e232282d5ba3ce6a0f6976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D59 5296 bytes
font_01_sfnt_off00008f5f.bin
85989fbbe77d94b270ea48afdf2a7a81bf091d441ab8886f9c51a141aeed2943		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5F 10212 bytes

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