Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bceba3c045d15aa…

MALICIOUS

PDF

51.7 KB Created: 2020-08-07 23:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67b00e61cb0f2a0d89828a63250636b5 SHA-1: 4ba2cda4900e6eafabf2081dd5d06d2b74508269 SHA-256: 0bceba3c045d15aa3e87ac8e1a614a22f4dad02577663e2b3d6b5c6ea512d1b2
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to obscure malicious activity. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests this document may be part of a multi-stage attack where a password is provided to decrypt a payload.

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.com/pify?keyword=fisica+ciencia+y+tecnologia+pdf
    • http://files.marksmadmenband.com/uploads/1/3/1/4/131437530/7321743.pdf
    • http://files.sagemeadowranchllc.com/uploads/1/3/1/3/131383777/d0899cb76.pdf
    • http://wugarivo.newlondonbaptist.org/uploads/1/3/1/3/131379530/06c83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/zigisefafepulenobatunirab.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/atamasthana_sinhala.pdf
    • https://cdn.shopify.com/s/files/1/0430/8431/6823/files/git_branch_names.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/sulura.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98908457197.pdf
    • https://cdn.shopify.com/s/files/1/0436/1450/3075/files/81891487828.pdf
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/mewumividikexok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mikawewetekiwu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8850/files/mirrors_edge_catalyst_crack.pdf
    • https://cdn.shopify.com/s/files/1/0430/9080/4893/files/nokez.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/dao_arcane_warrior_build.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/kaxajepoxusas.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/37404243082.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_off00008802.bin
2a2ed246bb6911391c9811627e3dd2c13e15c4ac6e24e79a82b098787b5285cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8802 5284 bytes
font_01_sfnt_off00009a27.bin
f1d37591365db8460256420bf0e35bb1b5c023ec42f616eb2e4aece017a5253c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A27 11608 bytes

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