Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a7d22e5941d594…

MALICIOUS

PDF

41.4 KB Created: 2020-08-23 18:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae2525102bd42476d3d242f41fdcbf7f SHA-1: c426dd4afb504445e2765528306b10f2c47674a0 SHA-256: 89a7d22e5941d5943c3d5cd39c4ea2ca2a2ea299aac3fb59662ea1cc6bf8bf20
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a Facebook notification. The document body, though heavily obfuscated, contains text related to 'Facebook app temporarily unavailable' and the malicious URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the link leads to known malicious infrastructure. The presence of numerous other PDF links suggests a link farm for SEO poisoning or to distribute further malware.

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.ru/pify?keyword=facebook+app+temporarily+unavailable+to
    • http://files.ronniedaddario.com/uploads/1/3/1/3/131380728/labagolonevukujipam.pdf
    • http://poxexofe.harchumanservices.com/uploads/1/3/0/7/130738732/5384484.pdf
    • http://files.hapevillegifted.com/uploads/1/3/0/7/130739704/3236955.pdf
    • http://files.soeasyofficial.com/uploads/1/3/1/3/131383297/9213273.pdf
    • https://cdn.shopify.com/s/files/1/0431/2242/6013/files/85656155018.pdf
    • https://cdn.shopify.com/s/files/1/0435/3644/9690/files/roman_catholic_bible_commentary.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/aplikasi_tik_tok.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/99997743130.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3899/files/52429132473.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/jogogepes.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/64631004105.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/xamalokosalexisobizak.pdf
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/rikamuzipifa.pdf
    • https://cdn.shopify.com/s/files/1/0439/3448/2587/files/phytophthora_parasitica.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_off000063be.bin
88642f842aeab8191d518f3e4afe6853f74712ccf3ca4216704acf94e471cbe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BE 5224 bytes
font_01_sfnt_off00007577.bin
b8f59b0b146a8a3383ba739114468c954affd5ed9a3a57fa19c6e0efe89194f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7577 10140 bytes

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