Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50bd3ff87c76045…

MALICIOUS

PDF

36.0 KB Created: 2020-08-11 19:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1059a952e01abf553bfb44cba70549f8 SHA-1: 39bee50e1bd9092aa71c9bfc9ddc1f469465c2ad SHA-256: d50bd3ff87c7604576a9795df7d3909eec08a43c88566993a150832f27ae3396
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. This redirector is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a lure for users to download or access malicious content. The presence of a large number of links, many hosted on 'cdn.shopify.com', indicates a link farm designed to improve search engine ranking for malicious content.

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=issuu+pdf+download+hack
    • http://files.jodavidson.net/uploads/1/3/0/8/130813710/2703593.pdf
    • http://files.shobukanisska.com/uploads/1/3/1/3/131380427/xukerelulado-bapusekameg.pdf
    • http://poriwojov.mob-tales.co.uk/uploads/1/3/1/6/131636664/naxokilomav-fazojumo-gojemar.pdf
    • http://files.ballardnightout.com/uploads/1/3/1/3/131381288/wunugodamat-guzasomidala.pdf
    • http://vebuka.com
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15074065918.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/78676783029.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/gta_3_skins.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/soparuvuridove.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7142/files/pogofuwufiwugedubap.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/42277199139.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1461/files/gifinag.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/fogedatamepolekifuxamug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaxesajikibulunetegidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1341/files/42841297486.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/rebavatugomimobeviwenevu.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_off00004d71.bin
64e597fe7139adacee499df3b9f8d946b3c2e7df0f46eda8c042f3c1dfd08f56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D71 5240 bytes
font_01_sfnt_off00005f50.bin
94e6f28399d5136b22947ef26c3732d9f6394ad97fcfbec91fb78628e004b6fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F50 10452 bytes

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