Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43f99f946fb2d92…

MALICIOUS

PDF

45.1 KB Created: 2020-08-07 15:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bd71c4be4d483778ac15b85cc1ec4cd SHA-1: 82e835f0cae726dab58cf041e67c33de3f0a4cdf SHA-256: f43f99f946fb2d9245d75cf7a08e04caa8c0c8635371d0664f3200916432735c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=difference+between+system+software+and+application+software+in+points+pdf'. The document body, though partially corrupted, contains text related to system software and the malicious URL. The presence of numerous external links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning attempt to disguise the malicious redirector. No scripts were extracted from this sample.

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.ru/pify?keyword=difference+between+system+software+and+application+software+in+points+pdf
    • http://files.bennewitzdds.com/uploads/1/3/1/8/131872021/a39f0fd.pdf
    • http://tesopew.harrisonskbb.co.uk/uploads/1/3/0/8/130874359/3579760.pdf
    • http://files.earthyware.com/uploads/1/3/0/8/130874085/6125360.pdf
    • https://cdn.shopify.com/s/files/1/0432/7279/8373/files/xolugolapekigopuko.pdf
    • https://cdn.shopify.com/s/files/1/0450/4194/2678/files/what_do_horses_eat_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0435/2039/3375/files/mafusakugijevizuliga.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/tefaveledab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/gukodotizaret.pdf
    • https://cdn.shopify.com/s/files/1/0429/1048/2591/files/examen_ceneval_simulador.pdf
    • https://cdn.shopify.com/s/files/1/0447/0823/3369/files/witcher_3_high_stakes_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/75457221767.pdf
    • https://cdn.shopify.com/s/files/1/0430/9604/7783/files/pifobewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/xixebirotubepa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2537/4103/files/15955539844.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3421/files/pididosogowomudoroz.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_off00006b7a.bin
b1c6e13f256178632a70f64c8537483e4b2dc51e50d98eb8111324c282230610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7A 5636 bytes
font_01_sfnt_off00007ea4.bin
1c86746bac36bfb1c9cfe9050373710b131b7d94ab1cd3e8d6bf58b59a59ee89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA4 12480 bytes

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