Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbe235d1af99e18…

MALICIOUS

PDF

40.6 KB Created: 2020-08-03 02:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 655615ca614c08c263dff59e37cd691b SHA-1: 33c3a3fd3b3c82b661e662951430b63b45e3685b SHA-256: 4bbe235d1af99e18e944e02c61a44c0a69d8f60470a47a42efa7f4dfdc1c487f
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many pointing to benign Shopify domains, but one critical link redirects through 'ttraff.cc' to a URL containing 'install brew on mac'. This indicates a lure designed to trick users into downloading potentially malicious software or visiting a phishing site. The presence of a malicious redirector link is the primary indicator of malicious intent.

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.cc/pify?keyword=install+brew+on+mac
    • http://files.afdpc.org/uploads/1/3/1/1/131164152/6541d56.pdf
    • http://files.intheloopradio.net/uploads/1/3/1/4/131410007/dokaj.pdf
    • http://files.thewarwicks1418.com/uploads/1/3/1/3/131379801/jodiwa.pdf
    • http://files.lhfieldfamilyfdn.org/uploads/1/3/1/3/131398091/6550427.pdf
    • http://files.carlakreftnd.com/uploads/1/3/1/4/131437615/kajokuzetula_goreje_zosedobe_mojukud.pdf
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/dovuwiduv.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/gelosilarilen.pdf
    • https://cdn.shopify.com/s/files/1/0436/5336/5910/files/puwadogujewulutede.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3276/files/4888165142.pdf
    • https://cdn.shopify.com/s/files/1/0434/7127/4146/files/60054666892.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/mugin.pdf
    • https://cdn.shopify.com/s/files/1/0435/1298/7802/files/lawevubudi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/fulolilezepuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/perfect_sara_shepard.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/letut.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_off00006091.bin
ee008daf150ba9ec4840493538d9ffc8b5110c1760e907cae134844daaa90dd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6091 5116 bytes
font_01_sfnt_off000071f0.bin
2c86de6bedf2a7d08de989868195c37288e4b9848044b7b1941f404da945f7f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F0 10816 bytes

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