Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8a2d26dd1fdc5d…

MALICIOUS

PDF

50.9 KB Created: 2020-08-20 21:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e95cbc19270a37a2832ab750eb95f8d6 SHA-1: 98698f69de3b98236c411534286be124a10d9024 SHA-256: ef8a2d26dd1fdc5d94b8dbfe775228985476996a247019a6fd31b8a168c4e6f8
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=augmented+analytics+pdf'. This indicates the document's primary purpose is to redirect the user to a malicious site. The document body also contains this URL, reinforcing the lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF.

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.cc/pify?keyword=augmented+analytics+pdf
    • http://dopenuw.takebackyourtv.com/uploads/1/3/1/4/131407469/dodenokorexifal.pdf
    • http://lulubam.mommyandmuse.com/uploads/1/3/2/6/132695278/sakifudebok-nalexo.pdf
    • https://cdn.shopify.com/s/files/1/0450/8853/8776/files/vespa_px_125_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/bowling_alone_putnam.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0632/files/advantages_of_franchising.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5621/files/83941711873.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/64324031364.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/nutefozexeporoxatod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/29683369665.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9910/files/buwot.pdf
    • https://cdn.shopify.com/s/files/1/0434/4607/5554/files/fuxegirasigoxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/safari_history_timestamp.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/zokitubosuluvatupulonipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9503/9905/files/calorimetry_problems_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/74527417876.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/whirlpool_thin_twin_manual.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_off00008990.bin
db494e0fc7abe335276861edaf8d7439e3d87b5b3d537f67febce5e3fd8eca2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8990 5472 bytes
font_01_sfnt_off00009c29.bin
b761daebca792e3a869ee859c91a81f580f7525e4654ac96fcda0b05705c927f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C29 10068 bytes

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