Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e662484a8eaeede…

MALICIOUS

PDF

46.5 KB Created: 2020-08-19 05:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78f9d083d6ae4cc5f4d9c09b63b2e87f SHA-1: 9e49b9b197f5be4126163360c80a88d4ae86b263 SHA-256: 0e662484a8eaeede1b39f0db9cb2124b5effa8a2f201ba02d3a2e162b8893b93
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One prominent link, 'https://ttraff.cc/pify?keyword=cd+bootable+windows+7', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious.

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=cd+bootable+windows+7
    • http://files.shoptheothersidegifts.com/uploads/1/3/1/1/131164205/janurorodubodirut.pdf
    • http://files.sampevclt.org/uploads/1/3/1/3/131380440/mikaluges-rokixegedobuloj-leneg.pdf
    • http://gutazu.sagebrushyoga.com/uploads/1/3/1/0/131070374/luwopolowepul_lupikugadis_sovebatupolerur_zinedudu.pdf
    • http://files.popmonkeytv.com/uploads/1/3/1/4/131437883/nebuso_xidemizuzukeb_jelewakan_bogenaz.pdf
    • http://wupimemix.artclassonline.net/uploads/1/3/0/7/130775934/junomebo_bekenusa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/tazuwowovada.pdf
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/pdf_to_word_document_converter_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2403/files/38553812905.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5793/files/benders_decomposition.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/82028912058.pdf
    • https://cdn.shopify.com/s/files/1/0431/0364/9954/files/50570177687.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/92732380714.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/luvoporujuburelodifokad.pdf
    • https://cdn.shopify.com/s/files/1/0431/4660/8794/files/bepofezotoron.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/39462248096.pdf
    • https://cdn.shopify.com/s/files/1/0438/6072/1829/files/37229382901.pdf
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/78666049367.pdf
    • https://cdn.shopify.com/s/files/1/0431/9503/9905/files/cdc_group_annual_report_2019.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_off0000735e.bin
fb7004d3b690809ff7782201b925e0d60f7e201e102614df2a9493f5e07cc854		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735E 4940 bytes
font_01_sfnt_off00008458.bin
7c875f57e541c1e9ab1879531c79c3b62c10f3543164cc920468b2f634744723		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8458 12668 bytes

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