Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc89c88cf4fa6459…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 21:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45912e0bb08648976515220e67b55cab SHA-1: 523621c8c6b8a4160111e5c7a29f9d29f57207a1 SHA-256: dc89c88cf4fa645957374c2ba977967335d81d6e5f251034057e4aba4dc3d8c5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with SEO link farms. One critical heuristic identified a link to a known malicious redirector at https://ttraff.ru/wb?keyword=osprey%20atmos%2065%20ag%20pack%20owners%20manual. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on various domains, suggesting a phishing or malicious redirection attempt.

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/wb?keyword=osprey%20atmos%2065%20ag%20pack%20owners%20manual
    • http://files.balancespaandyoga.com/uploads/1/3/0/7/130739016/loxodipuzumogazov.pdf
    • http://files.warwickkentphotos.com/uploads/1/3/0/8/130874683/kuwakukimiz.pdf
    • http://lekaluvo.peppermintcinema.com/uploads/1/3/0/8/130874642/dozepigiwowal.pdf
    • http://files.shallyns.com/uploads/1/3/2/6/132696030/80509bf2.pdf
    • http://files.s-w-p.org/uploads/1/3/1/6/131637529/lafolowumajav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3557/files/botanica_geral.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/cat_quantitative_aptitude_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/7660/7390/files/check_your_english_vocabulary_for_ielts_rawdon_wyatt.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/37378333886.pdf
    • https://cdn.shopify.com/s/files/1/0432/5192/5155/files/toxifowefugabejafikifux.pdf
    • https://cdn.shopify.com/s/files/1/0435/0391/1076/files/82677467005.pdf
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/63900194606.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/88596324832.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/jilivo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/taxomalulagawajalez.pdf
    • https://cdn.shopify.com/s/files/1/0441/3584/1944/files/7124357477.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_off0000583a.bin
b7466d2918606902da21670219204eb0230af3bfc3c2d9fa1933207457f16822
pdf-font-stream PDF embedded font (sfnt) at offset 0x583A 5816 bytes
font_01_sfnt_off00006c0f.bin
4e92bda55a3d3efe0d77b3c8ffc4793f28bc3c8d6b73042c4feb32d548de9a21
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0F 15036 bytes