Malicious PDF — malware analysis report

Static analysis result for SHA-256 d280f9b0e0b0f1f4…

MALICIOUS

PDF

46.4 KB Created: 2020-08-03 13:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f0a9ec2f9a24f3e84045092a4be08c0 SHA-1: 8d9bd3c4263fff3b7932846ded3a44b26f3e693e SHA-256: d280f9b0e0b0f1f46d0179c3445007245fac8bce533b3765e2cb8dd4e019418f
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, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, 'https://ttraff.ru/pify?keyword=factores+psicologicos+en+la+adolescencia+pdf', is flagged as a malicious redirector. This suggests the document's purpose is to redirect users to malicious sites under the guise of providing academic resources.

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=factores+psicologicos+en+la+adolescencia+pdf
    • http://wudixare.rebeccarankinyoga.com/uploads/1/3/0/7/130776644/51e9b83ac37.pdf
    • http://files.barbaraervin.com/uploads/1/3/2/6/132681443/3845620.pdf
    • http://files.kristysfineart.com/uploads/1/3/1/3/131380482/banufonokarig.pdf
    • http://files.nmbathessentials.net/uploads/1/3/1/4/131408546/62edf0ed5e3f9.pdf
    • https://cdn.shopify.com/s/files/1/0440/6044/2774/files/runavazoki.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/gilbarco_genuine_parts.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/volvo_s60_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/pevofa.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/22577955975.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/xejobeketus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3511/files/kaludivadorepavatukexis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/geliwinoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/kofivobujozojorikuroxupim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdf
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/98983810260.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/megobosa.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_off00007394.bin
53284375b4816aa978daed417f94607a617ced9cc53ad70f3f3968e674637e21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7394 5276 bytes
font_01_sfnt_off00008596.bin
3289e65b3f95fa06c1a3623a86186b2646b9d854410d3daa5fa796d679361ef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8596 11468 bytes

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