Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38e769f8ced39ab…

MALICIOUS

PDF

41.0 KB Created: 2020-08-28 09:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a0693946a5378ff6f703df7d0d140e9 SHA-1: 3135e2409c2d8d6671d44a05dde04796b4978cdf SHA-256: a38e769f8ced39ab72e99b8340bc1e355b2af4314aea629a357aa8d12de0d9db
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=libro+el+caballero+dela+armadura+oxidada', which is likely intended to lead the user to malicious content. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, suggesting an attempt to obscure the true malicious destination or engage in SEO manipulation for malicious purposes.

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=libro+el+caballero+dela+armadura+oxidada
    • http://files.sciencelife.org/uploads/1/3/1/0/131071209/favubu.pdf
    • http://files.teamhighlightreel.com/uploads/1/3/1/4/131453256/jakuso_pivetid_leritasataxi_zedorefalikos.pdf
    • http://files.msjonline.com.au/uploads/1/3/1/3/131381518/betusosazadij_mokilolepaja_karekop_vaxab.pdf
    • http://ledifaro.simplycreativetreasures.com/uploads/1/3/1/6/131606271/25a91937a.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/37087190347.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3019/files/buxupixakovezonura.pdf
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/91534054554.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/hardwick_vt_police_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/7440/5023/files/pexurenenenawuvalusunup.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/fosuxanomepoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5897/8207/files/92484895269.pdf
    • https://cdn.shopify.com/s/files/1/0436/9969/9866/files/37921577672.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/lelaridalarinuxutij.pdf
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/street_fighter_for_nintendo_64.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8537/files/90863640390.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_off00005f19.bin
bf203f1c435e3bbdcff42dd844d136989fce0c0430355557f5bf966ebddb7b92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F19 5056 bytes
font_01_sfnt_off00007027.bin
8afdf9f444e6cc3c3db74f77cbd4976483c4ff9a3f376faab0160ad4de3f142e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7027 11352 bytes

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