Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9c2b42b4cf0115…

MALICIOUS

PDF

44.4 KB Created: 2020-08-04 04:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0377113c032846af86ad220e6f19c919 SHA-1: f8af69afa84fb0d52d548b2d473ab4ff219a02f3 SHA-256: ab9c2b42b4cf0115ccf9601a04e174e5c9bbae4825c48907838c3d68dd173c11
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=apostila+de+administra%25C3%25A7%25C3%25A3o+estrat%25C3%25A9gica+em+pdf', points to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Apostila de administração estratégica em pdf', suggesting a lure to download or view a document. The presence of numerous Shopify URLs, some benign and some unknown, indicates an attempt to blend malicious links with seemingly legitimate ones.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=apostila+de+administra%25C3%25A7%25C3%25A3o+estrat%25C3%25A9gica+em+pdf
    • http://nabuwo.illinoishousematch.com/uploads/1/3/1/4/131482952/53d5e9bdc94.pdf
    • http://files.robynlester.com/uploads/1/3/0/8/130874567/fipubufud.pdf
    • http://files.sobremesasmag.org/uploads/1/3/1/4/131455543/8246187.pdf
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/6294114891.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0486/files/92159713644.pdf
    • https://cdn.shopify.com/s/files/1/0429/1254/6975/files/fozeridivawibibigeruz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0262/files/1449790042.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/vezojutarejodes.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/sinib.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/pimiralojivobabidoboki.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/xegod.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2359/files/wegafafapukoba.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/99511432627.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/91224367941.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_off00006b85.bin
1fe1d0a4ab38e30372b8382f31b9c551daafce8f9eec2727d77419f6ad64b786		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B85 6104 bytes
font_01_sfnt_off00007f1d.bin
515010022b2f1ae615e9fd4055372eb9e0879c46560b53f2eef2bb03fe15a2d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1D 11732 bytes

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