Malicious PDF — malware analysis report

Static analysis result for SHA-256 8439b6e2fb9af46c…

MALICIOUS

PDF

48.3 KB Created: 2020-08-04 12:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12bc0d972ec29fb8be71b2a0fd441cbb SHA-1: e25610d6ee11ebc4580073bc6aea51506ef303a4 SHA-256: 8439b6e2fb9af46c0d156c87a337ed1fb4486f836eae28742a875cde93274615
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'ttraff.cc' domain. The document body, though heavily obfuscated, contains text related to 'IFRS 16 leases KPMG PDF', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links, many pointing to potentially untrusted domains, further supports the 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.cc/pify?keyword=ifrs+16+leases+kpmg+pdf
    • http://files.hickmanhighschooltheatre.com/uploads/1/3/1/4/131453005/786616.pdf
    • http://sivuve.nationalscholarfoundation.org/uploads/1/3/1/4/131408738/nojumufogijiri-womijoritepidid.pdf
    • http://files.allcityelectricalie.com/uploads/1/3/2/8/132815206/9a9ae31419.pdf
    • http://files.sisterfriendlyproductions.com/uploads/1/3/2/6/132681281/fa680.pdf
    • http://files.markseaton72.com/uploads/1/3/1/8/131871799/ecae8667cde.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/bizumikut.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/dynamics_of_machinery_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/66740139873.pdf
    • https://cdn.shopify.com/s/files/1/0433/2827/4587/files/jamelugezazubaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/wubezuruludexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1188956193.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/pekek.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/gawelununitosim.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/63599121552.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/65334239240.pdf
    • https://cdn.shopify.com/s/files/1/0436/4464/9630/files/80363202293.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/97301953812.pdf
    • https://cdn.shopify.com/s/files/1/0428/8102/4159/files/sixuzotizesimozubevoganov.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_off0000736d.bin
4b2cd8ff18381b640ff43af29355616dc8649d04c27b030838d21de0da4d4021		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736D 5012 bytes
font_01_sfnt_off00008476.bin
9b9a4368e87882bf14f7c42f206f6720fa6b76027ce805d828548060c90dc578		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8476 9748 bytes
font_02_sfnt_off0000a5ca.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5CA 4324 bytes

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