Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b230fed4358ea0…

MALICIOUS

PDF

41.5 KB Created: 2020-08-21 22:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 759e0930cba15851b50e5e10777b30e2 SHA-1: 00ba155e20067efaf74cfaf761e0b8164dc1f3e6 SHA-256: 32b230fed4358ea0395bf3c72f2ae7c51b6f7ac8ee0669eecb137f0c9f3e5313
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external URLs. One critical heuristic identifies a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=dark+harvest+lux+guide'. The document body, though heavily obfuscated, also contains this URL. The presence of a large number of links, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute malicious content through a seemingly benign document.

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=dark+harvest+lux+guide
    • http://files.bathstringsacademy.org/uploads/1/3/1/4/131407469/85477215ae.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/navupigetewij.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/vejulaxavofegubenefubimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3071/6322/files/3897171049.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1030/files/64969678724.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5216/files/asme_viii_div_1_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/mutawowosisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/saxotoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0429/2352/4259/files/checklist_template_for_observation.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8752/files/the_human_brain_coloring_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/16118009635.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055ee.bin
b95f484bf19ee334a30cfe518f1edd2ce617ff839e822ba78b3e83a7c20bd1b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55EE 3448 bytes
font_01_sfnt_off00006261.bin
8d1c18310f1d526e5c5cb452abcf0a548e4ae560881d0111135d69d6059fbe32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6261 5280 bytes
font_02_sfnt_off00007459.bin
7dd68068cc2dac70260648034777ffff5233270d978f28bb01d1235ef533e0c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7459 10700 bytes

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