Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d48d465066f59e…

MALICIOUS

PDF

42.4 KB Created: 2020-07-31 20:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1addd55686e445cd27fd343c39b15438 SHA-1: 9289215f6644f689049a43f6d81f0d382601ebca SHA-256: b3d48d465066f59e72e37ac84de4d9f210f3f163f29c002fc29c51bf1c9a680e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users into downloading cracked software. The document body itself contains obfuscated text and URLs, including the malicious redirector URL and numerous links to Shopify-hosted PDFs, likely part of a link farm to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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/pify?keyword=antares+autotune+efx+crack
    • http://files.overseersmasonicriders.com/uploads/1/3/0/7/130776208/depuzuzuwija.pdf
    • http://files.zaxanagian.com/uploads/1/3/1/6/131606065/7958746.pdf
    • http://files.shauneb.co.uk/uploads/1/3/0/7/130776254/483066.pdf
    • http://files.riverplus-vision.com/uploads/1/3/1/3/131380008/rovugumege_guzidu_zetaguf.pdf
    • http://files.theservantmessengers.org/uploads/1/3/2/8/132814050/bajobuxikitawogig.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/ranorosita.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9703/files/94229043243.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37638787324.pdf
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/35883260107.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/50107041796.pdf
    • https://cdn.shopify.com/s/files/1/0435/6443/3569/files/mifejag.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/beliwox.pdf
    • https://cdn.shopify.com/s/files/1/0437/5996/0218/files/25909127661.pdf
    • https://cdn.shopify.com/s/files/1/0437/8286/5047/files/binezuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0993/files/51378717526.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixedazatujiguxup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3696/files/46223970982.pdf
    • https://cdn.shopify.com/s/files/1/0430/6406/6209/files/gagumodakupemazemoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8850/1143/files/dosafa.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_off0000676b.bin
c7797a504bf77413c2f93f96d6c63f4481f76f9f87afb82b70f3364ad4b3198b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x676B 4964 bytes
font_01_sfnt_off00007865.bin
ee7a86a23c7a604966998ef4d28699dfa8ff2f4f39d8ef6c1820f9c1b219a07b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7865 10632 bytes

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