Malicious PDF — malware analysis report

Static analysis result for SHA-256 afddd0a1cb158247…

MALICIOUS

PDF

51.0 KB Created: 2020-08-08 11:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c287e09e98d7975512403ff6b2e3c4a9 SHA-1: 6f4cbc4db1532b58be785b6d46f168494b4671e4 SHA-256: afddd0a1cb1582474e80655adcdbf782e1731e220276381fab48120a8c7f21d7
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a download for 'Sbi bank exam books pdf download'. The ML classifier strongly indicates maliciousness. The embedded URL is part of a link farm designed to manipulate search engine results, ultimately leading to the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=sbi+bank+exam+books+pdf+download
    • http://files.liberationgifts.com/uploads/1/3/0/8/130874655/fepupekubevage.pdf
    • http://files.oakridgevillage.org/uploads/1/3/0/8/130874655/todox-pejabewefereko-xanuxirorar.pdf
    • http://pegux.jodirenshaw.com/uploads/1/3/0/7/130775934/varuv.pdf
    • http://files.oakridgevillage.org/uploads/1
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/24628563526.pdf
    • https://cdn.shopify.com/s/files/1/0447/7802/9213/files/chain_rule_explained.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/loki_s_vault_of_borrowed_items.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/flow_cytometry_protocols_hawley.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/wopeboxatavoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/6568/8743/files/91115565180.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0096/files/xorufimemozawizijuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3078/9800/files/active_causative_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/34804324962.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/online_application_form_1093.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/1660393583.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_off00008a40.bin
25be154cdad21e574172b12eed1ec8530cf7e85bdcf290964999d9b1ab655f4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A40 5556 bytes
font_01_sfnt_off00009d31.bin
9047ca01befcc5f1f067105a2289a48be622c751af06dc3f11e451c326342049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D31 9900 bytes

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