Malicious PDF — malware analysis report

Static analysis result for SHA-256 142a0e228caafcfd…

MALICIOUS

PDF

55.5 KB Created: 2020-08-12 15:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7ad3eb280533588ece185fb1642f94f SHA-1: 38787f40471fa31cc9253da65937f6d98601eae5 SHA-256: 142a0e228caafcfd45e4f9c7afde55b9072f03485f29e4b73cf8b70e5e464149
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a redirector to malicious infrastructure at 'https://ttraff.com/pify?keyword=ansi+code+pdf+download'. The document body also contains this URL, suggesting it is the primary lure. The ML classifier strongly indicates maliciousness, and the presence of many external links points towards a link farm or redirection tactic.

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=ansi+code+pdf+download
    • http://files.stjohnspreschoolseaford.com/uploads/1/3/1/4/131483305/448576.pdf
    • http://files.linhaygallery.com.au/uploads/1/3/0/7/130739871/tixizafubepemon.pdf
    • http://files.follidaygallery.com/uploads/1/3/1/4/131482962/bifotoxozavoza.pdf
    • http://files.bhspantherplayhouse.org/uploads/1/3/1/4/131453288/rekubitoso-risazafemuxofag-raruke-lufara.pdf
    • http://files.pfcmooremess.com/uploads/1/3/0/7/130776072/65264bc54.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5485/7369/files/biloxi_blues_play.pdf
    • https://cdn.shopify.com/s/files/1/0448/2259/3698/files/88583773409.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/35221264404.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/94849076626.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/zugabopesajuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/social_media_management_proposal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/advanced_mathematics_an_incremental_development_solutions_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/95492004020.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/manual_weed_wackers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/nupitodapotutadug.pdf
    • https://cdn.shopify.com/s/files/1/0441/3577/6408/files/6564627068.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/dosatidizutiwok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.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_off00007242.bin
7c6928fb24607a95b4fc6a00720a54bb7e8e67d91ab2809b536513c0d62ceb89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7242 5136 bytes
font_01_sfnt_off000083dd.bin
37245fce14ae0433243766642a48fc3e2e583f35c70aaa92b8632fc663105050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83DD 26284 bytes

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