Malicious PDF — malware analysis report

Static analysis result for SHA-256 74aef64615638022…

MALICIOUS

PDF

44.5 KB Created: 2020-08-15 22:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ec25f1d77bd40ac5ea41868b4af5d0a SHA-1: c589f405030e788ec1dbd72f4847f5c62d9c00f7 SHA-256: 74aef64615638022f9b51b2b8201d777df03ee8ae4d632961d4b10aa3044f665
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at ttraff.com. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack.

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/wb?keyword=kurzschrift%20lernen%20pdf
    • http://winubegir.mclactation.com/uploads/1/3/0/7/130775607/nadopuvaz.pdf
    • http://munul.armandalegmusic.com/uploads/1/3/1/6/131606289/vekeworuwes.pdf
    • http://zunumase.emedicalsol.com/uploads/1/3/1/3/131398091/7740878.pdf
    • http://files.anchorcounselingwellness.com/uploads/1/3/0/8/130873893/5517988.pdf
    • http://zinet.nic-hunter.com/uploads/1/3/1/0/131070841/5601128.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/7641/8713/files/vevorolilumixarufanukum.pdf
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/bixopad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9187/7283/files/xosafezeniladadara.pdf
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/54203019671.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/68168172699.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/samafasuzijaput.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/98135308939.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/menitovef.pdf
    • https://cdn.shopify.com/s/files/1/0451/0928/0933/files/addressing_modes_in_assembly_language.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/76916192807.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/getadugumefuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/88293441713.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000609a.bin
ee1203ba63bb253e75fa2a3aeea81674a905280e8774c25b6c76cc6d3cbd4a7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609A 4824 bytes
font_01_sfnt_off000070fd.bin
54412a06e1447720caf40d92212c930bff0489eff42eb4732a565e9ab7619c5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FD 11068 bytes
font_02_sfnt_off00009547.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9547 4324 bytes

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