Malicious PDF — malware analysis report

Static analysis result for SHA-256 007abc934e870d0f…

MALICIOUS

PDF

43.4 KB Created: 2020-07-21 05:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da204de9b54da561b780c9a9cb33ca4c SHA-1: ade45cf233f2f0e0e7db36880f397ef047f00517 SHA-256: 007abc934e870d0feed65afb977a4f17da9b297947a2b97c6ca484df2d19761b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic identifying it as a PDF SEO link farm. One of these links, 'https://ttraff.ru/wb?keyword=tds%20certificate%20form%2016%20pdf', is flagged as a known malicious redirector. This indicates the document's primary purpose is to lure users to malicious sites, likely for further exploitation or credential harvesting.

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/wb?keyword=tds%20certificate%20form%2016%20pdf
    • http://files.cedarsmontessori.com/uploads/1/3/2/7/132712407/78d9fb040f35.pdf
    • http://files.tulipshealthandbeauty.com/uploads/1/3/1/4/131453018/701694.pdf
    • http://files.reciclamospr.org/uploads/1/3/1/3/131380895/703ea9ebd65f50.pdf
    • http://files.3ganfantasyfootball.com/uploads/1/3/0/9/130970012/budafadili_wovogotul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/96501631703.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/givuxupigeve.pdf
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/jimukipolidofakole.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/72421006375.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/27035406527.pdf
    • https://mirusafib.files.wordpress.com/2020/06/koxaxumotujosikusonav.pdf
    • https://masewow.files.wordpress.com/2020/07/logunugakobudiwuriga.pdf
    • https://fureduz.files.wordpress.com/2020/07/notimoruda.pdf
    • https://cdn.shopify.com/s/files/1/0432/7365/0334/files/fusuvipegapon.pdf
    • https://cdn.shopify.com/s/files/1/0430/5567/7591/files/95713378743.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2943/files/kapovugeretomogeronex.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/20386810696.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/32743486207.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/ravafitesevobuzapuxif.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/75735336105.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1571/files/74534090125.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_off00006d1c.bin
3516d08ec682369881b22faefaf8becf2b213597d4e12cc92177912628cbdb18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1C 5104 bytes
font_01_sfnt_off00007e78.bin
b1f1790fbccbcfc28bbf643b0826a5a05117a18cb1814c2e4576431f1b35cca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E78 9968 bytes

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