Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f2cf6364fae454…

MALICIOUS

PDF

48.9 KB Created: 2020-07-30 00:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09d8955e7da757d8a1626ce66ae6b367 SHA-1: 6f1977799a8e1bc9b02bee7b825d3579a9b4ae67 SHA-256: 63f2cf6364fae45457eda54ed5a4144c146e4d61d5133101bb1c9790e44064a6
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, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to a 'bulletproof diet pdf free download'. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute further malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this file.

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/pify?keyword=the+bulletproof+diet+pdf+free+download
    • http://files.educatorlaurawynn2.com/uploads/1/3/0/7/130775145/f612c3b80.pdf
    • http://files.abbyweiss.com/uploads/1/3/1/4/131453946/nifodifojutidewe.pdf
    • http://files.bandofgypsiesranch.com/uploads/1/3/1/6/131606159/lisonep_dajiwasuwawoset_bexomebowopoxab_mejomumexidabor.pdf
    • http://files.charlierichmond.com/uploads/1/3/0/8/130874368/xotezalesejewimi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/99609207539.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/54383715566.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8497/files/nutarusafetelufozavesolal.pdf
    • https://cdn.shopify.com/s/files/1/0432/5035/2296/files/40531926836.pdf
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/jigasejexilepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3829/files/97261079003.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/gedujapelejizig.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/51888911277.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/85180271488.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/wofaziwakoxejenidipukiwet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/25044320962.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_off0000835a.bin
f9ed583dfe079c5c019408e41b7ad6dc248076deda04ec46f4b0467640306f67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835A 5016 bytes
font_01_sfnt_off00009465.bin
03cd3067d2623d4275d66110151cb05fa9e13aebf017d9b45ca514f80dc42250		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9465 9868 bytes

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