Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd54806c8ad62b0…

MALICIOUS

PDF

57.1 KB Created: 2020-08-11 16:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e788feadc2db528dfed9c7781b70a22d SHA-1: 3c0ce6a88a286dbf7876c30075a6802d6cbb8e9e SHA-256: 6dd54806c8ad62b05b052c45a37386a1e351ef6359b1076a626ab970651a299b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. This suggests the PDF is part of a link farm designed to distribute malware or phish users. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious classification.

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.cc/pify?keyword=metafisica+aristoteles+pdf+descargar
    • http://files.holmesroadchurch.org/uploads/1/3/2/6/132695714/a4d336a5b84978.pdf
    • http://files.thelakemermaidempire.com/uploads/1/3/1/3/131383493/sazazes.pdf
    • http://files.thinkerslodgehistories.com/uploads/1/3/0/7/130739996/kevijesifi.pdf
    • http://files.burleybridge.com/uploads/1/3/2/8/132814250/wazodal-katom.pdf
    • http://kufuditam.maronianinsurance.com/uploads/1/3/1/6/131606490/betov-vepalesixuz-patavo-betilet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/disilo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/divogevosekiwiredubabozim.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/vesoxudajozud.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3557/files/roresar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/toraladomokipina.pdf
    • https://cdn.shopify.com/s/files/1/0430/3690/1527/files/zolopupuwur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdf
    • https://cdn.shopify.com/s/files/1/0447/9824/7069/files/17_note_kalimba_songs.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/pujosobij.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/10081055646.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/warhammer_40k_ork_codex_vk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a3b.bin
6a07ce840378089f16782d64d88107a1bf33ba1f773149cd617424985e9b02a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3B 5012 bytes
font_01_sfnt_off00009b5c.bin
d12f61e84bdba2378f81b6ecc7d53fe06a94165ef9db302f712fd8454e219f3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B5C 14496 bytes
font_02_sfnt_off0000c719.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC719 4324 bytes

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