Malicious PDF — malware analysis report

Static analysis result for SHA-256 58156d3f8333968f…

MALICIOUS

PDF

40.6 KB Created: 2020-08-11 19:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b06d45bc8ec00c778307120d0119d55 SHA-1: b965c15ccd6aecf12461eaeb3c859b8a2a2dddba SHA-256: 58156d3f8333968f7eb12362c8aa8504c2ed1225221d5461e3642df341762127
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to other PDF files, a technique often used for SEO manipulation or to host malicious content. One of the embedded links points to a known malicious redirector URL (ttraff.com), indicating a potential phishing or malware distribution attempt. The document body is heavily obfuscated and contains what appears to be metadata from the wkhtmltopdf tool, suggesting it was programmatically generated.

Heuristics 3

  • 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.
  • 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=definicion+de+demografia+pdf
    • http://files.katiemachain.com/uploads/1/3/1/4/131455283/57a787ca629.pdf
    • http://xidakolas.oesubmuact46.org/uploads/1/3/1/4/131437502/muvotax.pdf
    • http://virurubuk.colorbrushcanvas.com/uploads/1/3/1/8/131857631/99f55.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8903/files/car_suspension_parts_names.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/87030336561.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/pathophysiology_of_asthma_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2247/files/gastritis_aguda_hemorragica.pdf
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/lozebufebewo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/grade_7_maths_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/16300383660.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nakoximowukod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/12643819804.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/veguvutajojalomaxipojis.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/xulew.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f18.bin
060d3a15e838ef37191b5bdf337c9363801c022dbb958ea2701feb3d38785845		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F18 5264 bytes
font_01_sfnt_off000070ec.bin
8c07752cc122b929af8ba60396f2d76b6a351812811abe05bebeb19c9b252f1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70EC 10940 bytes

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