Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f40bfd181d6757…

MALICIOUS

PDF

62.7 KB Created: 2020-08-06 17:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc736e1d7f535baa2a664cb60cb22cb8 SHA-1: 32801148a034220d4fa47e13090a3b6af1e6671b SHA-256: 02f40bfd181d6757b9029b0f4811e674483d59732480f507f869415209aeb0bb
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to what appears to be a link farm designed to host PDF files. One prominent link, 'https://ttraff.ru/pify?keyword=geometric+probability+distribution+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=geometric+probability+distribution+pdf
    • http://files.beerliquordelivery.ca/uploads/1/3/2/7/132712558/9564913.pdf
    • http://files.bmwenthusiast.ca/uploads/1/3/1/6/131606733/bikagogetojex.pdf
    • http://files.twainquiry.co.uk/uploads/1/3/0/8/130814118/7092949.pdf
    • http://files.southernsass.shop/uploads/1/3/2/8/132814593/rurofosufuxetut-fojigalusota-xufujamezore.pdf
    • http://files.ranvill.com/uploads/1/3/1/0/131069899/vupiridotiseg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/pepiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/5697/9351/files/tuesdays_with_morrie_sparknotes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/88960699936.pdf
    • https://cdn.shopify.com/s/files/1/0437/3266/4481/files/66537760062.pdf
    • https://cdn.shopify.com/s/files/1/0434/1638/7733/files/kafomoguvovojoparepuwuwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/bidipekopofizexozuxuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/fulotikevupedubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/55555321267.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/rule_34_star_trek.pdf
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/fodofubimazowofa.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009378.bin
dfb86ad6d2a1c49458fb2b2f34cf7f652d333b3552a4835639de81779dda0567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9378 5572 bytes
font_01_sfnt_off0000a658.bin
785c0bcd753a8bd9b073064e220d454686c260384b435ad52e5aeaec68d6b474		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA658 15244 bytes
font_02_sfnt_off0000d6c7.bin
9cf2a0953b2527320edcb60f7d9d58d30bdedd272f4d309197636b1fecf35109		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C7 16580 bytes

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