Malicious PDF — malware analysis report

Static analysis result for SHA-256 0babf87c1b4d5698…

MALICIOUS

PDF

46.3 KB Created: 2020-09-01 10:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c46539b7b78ca2c3d9d2c4060f633ce0 SHA-1: 2ad0127c998c7501986bd9ab378ac19d593c7b47 SHA-256: 0babf87c1b4d5698846b4065a44415d533335655c0264ced3197b71a409b2e77
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 pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One prominent link, 'https://ttraff.ru/pify?keyword=watch+dogs+2+mod+apk+android', is flagged as a malicious redirector, indicating an attempt to lead users to harmful content. The document body, though heavily obfuscated, contains a similar URL, reinforcing 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.ru/pify?keyword=watch+dogs+2+mod+apk+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7810/7811/files/kodivufadakewozob.pdf
    • https://cdn.shopify.com/s/files/1/0463/4473/2833/files/16443480641.pdf
    • https://cdn.shopify.com/s/files/1/0435/6925/0463/files/pulitufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/garena_authenticator_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0769/files/tapagiferutabeduveke.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/besoin_en_fond_de_roulement_normatif_exercice_corrig.pdf
    • https://cdn.shopify.com/s/files/1/0437/7886/7354/files/gujasimivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/statistical_modeling_by_wavelets_vidakovic.pdf
    • https://static.usrfiles.com/ugd/97368a_5072b88a1b094752bbde80ff403c3802.pdf
    • https://static.usrfiles.com/ugd/b5472a_82b92fbe99df490b87128469372e49fb.pdf
    • https://cdn.shopify.com/s/files/1/0432/0457/5387/files/21891919551.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/nizupedawopunutilipodomu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3066/5637/files/ppt_slide_presentation_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/5205/7244/files/article_writing_format_cbse_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/faxizuved.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_off000074bc.bin
d6885c449ee2f2ee6aff256abef84eec606d3c3e6ad41df07ab573fe60dcc8e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BC 5664 bytes
font_01_sfnt_off000087eb.bin
7c0deb053bb74134a5e5466fd11482c031e135ccef71a23c862908de6bf5816c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87EB 10704 bytes

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