Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34b70f9c379a3cf…

MALICIOUS

PDF

39.2 KB Created: 2020-08-12 23:39:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2ac084fb802d820862f0e8270403111 SHA-1: 7a1680d06f57e96a7b7a21ca844572646e53cfa6 SHA-256: a34b70f9c379a3cf8ca0161aff8c54e1aaedd257c33c60d1c64d823871e87daa
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous embedded URLs, including a redirector to 'ttraff.cc', which is known malicious infrastructure. The primary intent appears to be directing users to potentially harmful content through a large number of external links.

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=1st+year+books+pdf
    • http://sateven.quantumenergetichealings.com/uploads/1/3/2/6/132682883/gawikixolagegu_zimozidaze_sanixibu.pdf
    • http://files.sacramentomedicalspa.com/uploads/1/3/1/4/131453350/a45c02.pdf
    • http://pexiz.pokemontcgstore.com/uploads/1/3/1/4/131453574/1d1d35b8295662.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/benzodiazepinas_elsevier.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1115/files/classroom_rules_flashcards.pdf
    • https://cdn.shopify.com/s/files/1/0435/4965/5203/files/foperitazigajusafaxironu.pdf
    • https://cdn.shopify.com/s/files/1/0448/2508/4065/files/que_es_anlisis_foda.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/29431217028.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6112/files/accounting_and_financial_management_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/64871428506.pdf
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/electronic_devices_and_circuits_multiple_choice_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/acls_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/hip_labral_repair_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/nubasaxal.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_off00005e94.bin
bb7f3515f519921a1027dd4d49fc209a302b224d77f25fa566d27848eba2f62c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E94 5264 bytes
font_01_sfnt_off0000708f.bin
bcc02adb1cb63a4bca35c6a4cc43a326594b1553f6412ba6562cf0537cd14998		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708F 9244 bytes

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