Malicious PDF — malware analysis report

Static analysis result for SHA-256 b603c07aaa2b1ab9…

MALICIOUS

PDF

42.9 KB Created: 2020-08-05 09:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9185d045573b36509ebf6351d0517b71 SHA-1: 20c90b77e821920cece5aea82b60475dac50ffb6 SHA-256: b603c07aaa2b1ab965e0eec766c9abd39840f6558415aea933370028028b4147
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with a critical heuristic identifying a link to a known malicious redirector at https://ttraff.com/pify?keyword=acidosis+tubular+renal+en+ni%25C3%25B1os+pdf. The document body is heavily obfuscated but contains this URL, suggesting the primary purpose is to lure the user to this malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential SEO poisoning or link farm strategy to distribute malicious content.

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.com/pify?keyword=acidosis+tubular+renal+en+ni%25C3%25B1os+pdf
    • http://files.yongonzalezinternational.com/uploads/1/3/2/8/132814136/vizenenujipuzu_nutusuzofowasex_tifigiwi_dijewarex.pdf
    • http://files.samanthalivinglive.com/uploads/1/3/0/7/130776073/zevigagolafas.pdf
    • http://files.cinematasmoviemadness.com/uploads/1/3/0/7/130775027/kisoretojiku.pdf
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/46991615124.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/19944343323.pdf
    • https://cdn.shopify.com/s/files/1/0437/3286/1079/files/general_journal_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/63702674247.pdf
    • https://cdn.shopify.com/s/files/1/0436/2108/9444/files/energia_hidraulica_libros.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/kajiselijuduzawekofazomi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/kedopujoxajoje.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/69099709269.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/42304208242.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/43020348083.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_off000067f5.bin
f2e235eca263f22fa7e6efb577387864b2eceb4c1653cc7e2a36eec9929aaa24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F5 5492 bytes
font_01_sfnt_off00007a6c.bin
5b89dc305592b0d59510a952d9dfcc5ed8a3c10b633b3240f6f474655812939c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6C 10068 bytes

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