Malicious PDF — malware analysis report

Static analysis result for SHA-256 746ab20299068a41…

MALICIOUS

PDF

42.7 KB Created: 2020-08-13 22:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40506d2eb395d7ed5338acc431858fe8 SHA-1: 3cf148865f76282c74f9b5352a8c2204ac097e7c SHA-256: 746ab20299068a41c91cb811291ade198f27b54612616620fa61aae6f832739d
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for distributing malware or phishing pages. The document body, though heavily obfuscated, contains text suggesting it is a manual, likely a lure. The presence of numerous external PDF links further indicates a link farm, often used to obscure malicious destinations. No scripts were extracted, but the PDF structure and embedded links are strong indicators of malicious intent.

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.com/pify?keyword=browning+pistol+vault+manual
    • http://satebegi.firstumcds.org/uploads/1/3/1/6/131606339/2093311.pdf
    • http://files.stirchleyartroom.co.uk/uploads/1/3/1/4/131408942/fogilusorutapazefal.pdf
    • http://gojaxip.shantellstricklanddavis.com/uploads/1/3/2/6/132681946/legusolozapaperan.pdf
    • http://files.kushifarm.com/uploads/1/3/1/0/131070452/likifanorewi-felowuker-xijenubanobat.pdf
    • http://files.nickygibbsdance.co.uk/uploads/1/3/2/6/132681409/1730420.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzawubemamomavokam.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2054/files/apparel_industry_in_sri_lanka_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/university_of_alberta_campus_recreation.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/49604452803.pdf
    • https://cdn.shopify.com/s/files/1/0436/6575/2217/files/partes_del_baumanometro_y_estetoscopio.pdf
    • https://cdn.shopify.com/s/files/1/0430/2798/8634/files/tufixujofal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1838/6588/files/durusafemasal.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/business_meeting_agenda_sample.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/sanemedatigunivufajem.pdf
    • https://cdn.shopify.com/s/files/1/0434/1111/2092/files/tixeponezas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/mudewuzawimito.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/dojagijamidutobofabujutel.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_off000066e0.bin
ae76d8a0e177de54776bb55bd3e3ceafa45318df6d5214deb3d0b6f6ebde7e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E0 5340 bytes
font_01_sfnt_off0000790f.bin
1782c0133474771bfd256225698132e7329730afc4a26f9f73d60038e47ee497		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 10800 bytes

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