Malicious PDF — malware analysis report

Static analysis result for SHA-256 c365f2944cb3638b…

MALICIOUS

PDF

41.5 KB Created: 2020-08-06 19:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40b31bb36f1ea7a5830d7b715d491774 SHA-1: c91fba48b60da1e0ea1268a39304c6774a253022 SHA-256: c365f2944cb3638b88af2381275aaa0747b73c23b0ff919aa9d150caae431b76
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.ru/pify?keyword=what+is+polygamy+marriage+pdf', which is part of a link farm designed to attract traffic. The document body, though heavily obfuscated, contains text related to the search query, suggesting a lure to trick users into clicking the malicious links.

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=what+is+polygamy+marriage+pdf
    • http://gawevelo.kaseandjase.com/uploads/1/3/0/7/130775493/7731967.pdf
    • http://files.aquestforhealthandpeace.com/uploads/1/3/1/4/131452804/8c8fc569.pdf
    • http://files.jacquelinetopakian.com/uploads/1/3/1/8/131856476/telaji_nuwuturasojo_seburesin_ziremixigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9887/files/96493662316.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/liwidivotijazawage.pdf
    • https://cdn.shopify.com/s/files/1/0437/5589/6990/files/66186641322.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/zadizevasoroz.pdf
    • https://cdn.shopify.com/s/files/1/0441/0851/3432/files/20391000496.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/zaferikonofusotar.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/61626628738.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6048/files/tratamiento_absceso_bartolino.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/58525143520.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/surge_arrester_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/pexufogegaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/bekibumijidesubidivugol.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/67569439137.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/
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000646b.bin
45094e660c7f6374c1c85365f10f2f4c124faadf94d6859282f4da1340d4e9fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x646B 5568 bytes
font_01_sfnt_off00007746.bin
16d7c84ef29aee4792c43425dd893f7f2edcf0354cc810d4b20c1e269bb23b1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7746 9908 bytes