Malicious PDF — malware analysis report

Static analysis result for SHA-256 b197f6ff25e9ad3c…

MALICIOUS

PDF

39.2 KB Created: 2020-10-07 06:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bd30c4061b30f065fedf97a097f76c97 SHA-1: 9f86a120ba2841e8494731348b31cf9b4a86f35c SHA-256: b197f6ff25e9ad3c6d35329fa753d2811884ce1dc57176fe06e129e332d04a51
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to known malicious redirector infrastructure or link farms. The document body, though partially obfuscated, includes a URL that appears to be a lure for a quiz, and the heuristic firings confirm the presence of malicious redirector links and a link farm. This suggests the document is designed to drive traffic to malicious sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.club/pify?keyword=renaissance+book+quiz+answers In PDF document text
    • http://files.homedoorfurnitures.com/uploads/1/3/0/8/130813632/xexexozofivaledo.pdfIn PDF document text
    • http://vomogopax.littlemoonyogaperth.com.au/uploads/1/3/0/8/130873951/3030523.pdfIn PDF document text
    • http://files.anglianpc.com/uploads/1/3/2/7/132712093/keporo_pitufetamar_fuferovomoxope.pdfIn PDF document text
    • http://puwuzine.wilsonhypnotherapy.com/uploads/1/3/2/6/132681834/246007.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a0b6e925-4eef-4a58-9457-e9b557a2e21a/ragoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1001c81a-1bf0-47f9-82f2-2039d176a474/juwinoxirerur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec00fbc4-8abf-4bc4-bf97-f5cf28241329/forimasasixuges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d48534f0-19c2-473f-8f45-307a8bf7f699/86041884075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46017a97-5e3a-4aa0-8e64-db55345cb3dc/malaratubujurakujipexip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5111/4908/files/lafetezukugoresizit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0728/2847/files/compressor_power_calculations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/what_is_chiraq_mean.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/wufekorelimazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c046e3-1119-4e22-b528-f63ed16a6c91/77764072875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dcceedb-311e-4abd-9bca-e71bfb63b10c/63211983679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0960af-3002-486e-b4a1-a71566787830/ruxiraxakulumorifo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA3 5040 bytes
SHA-256: 5f8967f4a7a799ba26b759088da606389cdc0708e52bb0fbf5ba46d80177051c
font_01_sfnt_off00005deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEB 10504 bytes
SHA-256: 346d6e3a301c3c3cd7fd0a3e5a6b7d4324e9853e7452080d2ee6ef1d5f119d26
font_02_sfnt_off000081d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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