Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4c506c131cfc2f…

MALICIOUS

PDF

58.6 KB Created: 2020-08-09 15:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 569ea3f130dbbff113e6a50e0591e656 SHA-1: dccb6afcd28d50f4c2ae0cf5632d733d36093988 SHA-256: 3b4c506c131cfc2ff28b49f32faef45e742f0e84dc9951ea2e35f32c35f805e5
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it points to a malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests the primary purpose is to redirect the user to a malicious site, likely for phishing or malware delivery.

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.com/pify?keyword=agriculture+bitbank+in+telugu+pdf
    • http://files.nanomat-conference.com/uploads/1/3/1/3/131398244/9278314.pdf
    • http://files.lutermangriefsupport.com/uploads/1/3/1/3/131383657/noseraziladagifov.pdf
    • http://files.daughterofthestarswellness.com/uploads/1/3/0/8/130874359/6ada28e4445e9c.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2421/files/muguzobuwesadedamilagak.pdf
    • https://cdn.shopify.com/s/files/1/0432/7188/0870/files/95365700235.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/6920585254.pdf
    • https://cdn.shopify.com/s/files/1/0435/4536/2591/files/61723636654.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/bilingualism_multilingualism.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/23246546190.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60233972239.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/31506910464.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/gigidatijugopiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/banach_space_and_hilbert_space.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/gerotiwajonozodonenamamup.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/tuparesozufakasit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000700d.bin
70ee00c7be0d3c8eb9af690f6b189cb7769364cbc6b609832da567e85c67715f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700D 5340 bytes
font_01_sfnt_off0000824b.bin
c9827b1c89f4b544bead82688171df8ec648477bc15f0714419bebbef963663d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x824B 24644 bytes
font_02_sfnt_off0000ba29.bin
4100133f0cea9c055e1ee3658bc04635aa8607d0cd2a17943d233f3262e97521		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA29 10460 bytes

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