Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d21357a39b046e…

MALICIOUS

PDF

39.7 KB Created: 2020-08-04 06:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfc40a2d09ac27c67a8d6f13f0a98cec SHA-1: ba0b2146ba09142bbfe33ae72ad8c8dcfbef08a9 SHA-256: 73d21357a39b046ea2652a997ef62209de7b5a169a49ee7727af5adf72f6754b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'autodwg dwg to pdf converter 2020 crack', suggesting a lure for pirated software. The presence of a link farm heuristic further indicates an attempt to manipulate search engine results or distribute malicious links. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=autodwg+dwg+to+pdf+converter+2020+crack
    • http://files.villalaurus-enluberon.net/uploads/1/3/0/7/130775470/7668302.pdf
    • http://files.yoursosweetamericandi.co.uk/uploads/1/3/2/7/132712229/katanonisazese.pdf
    • http://files.culturelli.fi/uploads/1/3/1/8/131871569/490eb75aaa734e.pdf
    • http://files.miramaroptimistclub.org/uploads/1/3/0/9/130969762/4197369.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7105/2707/files/pibine.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9162/files/mufawitiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0675/files/kowozedol.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9735/files/60758516416.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/berujixawajibexuxutuzogar.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/npc_id_list_wow_bfa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/genij.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/jexamimagujatebufa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9446/5948/files/discord_quote_text.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7692/files/44175556027.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/67428723159.pdf
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/21462917214.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c1f.bin
2c9ef10f676bbd10927185fda14de6e8f94b7d058dcfd23697a04863230b2962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1F 5592 bytes
font_01_sfnt_off00006f67.bin
43bc988cd5a1eed00cf91049fe5dab4a166ecf5313b0606ffcd07a51b26de3c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F67 10144 bytes

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