Malicious PDF — malware analysis report

Static analysis result for SHA-256 81c587a352282ce7…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 23:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a8672627edbf213261e3b13e85d9b8a SHA-1: 632b81b4de75768fc5dd00ac0106e59f49a6c894 SHA-256: 81c587a352282ce7d5c36357e026e8e024d4c7a23ba5772e91f845bef3fbef76
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body text, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. This suggests the document's primary purpose is to trick users into visiting a malicious website by presenting a lure related to a book download.

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=evi+nemeth+linux+administration+handbook+pdf
    • http://files.murrietajunkremoval.com/uploads/1/3/0/7/130774990/fiwikedukofej.pdf
    • http://files.northernriversbathroomrenovations.com.au/uploads/1/3/0/8/130873995/tebuweref.pdf
    • http://files.energyworx2.co.uk/uploads/1/3/1/3/131398097/gijuwemoxapuw-pileduseja-dejoleve.pdf
    • http://files.newmillerdam.info/uploads/1/3/2/7/132740250/dilisamumoneti.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/13275716301.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/ffxiv_easiest_dps.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/kawuzur.pdf
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/fukobimanog.pdf
    • https://cdn.shopify.com/s/files/1/0433/6327/0815/files/tepagebafonajerasosut.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/49677868912.pdf
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/herbalism_guide_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/vimop.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/theory_of_bergman_spaces.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_off00006294.bin
9f921560f28e5572f832f74030f933cbbef7f0b1ebf71acaf134198dadf6eeb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6294 5568 bytes
font_01_sfnt_off0000755d.bin
97185625179b2462e3249d9c2925ca14140e4762a4b03540fc3a67c0f102a609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755D 10736 bytes

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