Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff9ef9d60fc0d4b…

MALICIOUS

PDF

63.6 KB Created: 2020-08-09 00:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef778ed518dbdfbbe1aaab6d381f3b9f SHA-1: 3e0f849a5edfa4401af2b5b6f2b782c2384264be SHA-256: 5ff9ef9d60fc0d4bbebedaca22d90af87a4553c5cef325a6b350b925c13f67ac
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector. The document also includes a password lure, suggesting it may be used to conceal a malicious payload within an archive.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=que+es+el+analfabetismo+digital+pdf
    • http://files.sheilabanks.com/uploads/1/3/1/8/131856200/9963369.pdf
    • http://files.desertblossompreschool.com/uploads/1/3/1/6/131607047/3713561.pdf
    • http://valupuf.koiyamariephotography.com/uploads/1/3/0/7/130776485/gixuro_jikenefeletavox_ropidutapa_zotesezigoborip.pdf
    • http://nomedu.realabstractart.com/uploads/1/3/1/3/131379803/darimafafiwizu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/julit.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/mercury_barometer.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/90832875382.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/kixemasozarefisoguze.pdf
    • https://cdn.shopify.com/s/files/1/0431/0712/3357/files/types_of_cyberbullying.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pizejop.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/mimowefiderepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6914/5241/files/nowepurajivevupilovadu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/resonadokakiwabavuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4410/0506/files/kegazidajogin.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0427/files/39562146899.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5e1.bin
043012ae11caf47295e2ffe9fc7c5dac4f048041d6a68fef2964077e4d431ebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E1 5464 bytes
font_01_sfnt_off0000c863.bin
fa92cc163244f8b56c8a5de73145a56741278a567a0bcbd61fa006170a391758		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC863 11952 bytes

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