Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6b69047a4d3d6e…

MALICIOUS

PDF

121.2 KB Created: 2020-10-03 17:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 04551abc33577f1bf752b194fd561aae SHA-1: e845d5b44a96e5769eff4908a14eca400d7d0a1f SHA-256: 7b6b69047a4d3d6e518c12ee4cde0ed21df72789b05a22cc490bc7ecfec466f6
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users searching for 'map of african countries pdf'. The ML classifier strongly indicates maliciousness, and the presence of multiple external PDF links suggests a link farm or SEO manipulation tactic.

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://gettraff.ru/strik?keyword=map+of+african+countries+pdf In PDF document text
    • http://files.asbestosmasters.com/uploads/1/3/1/4/131453817/tetepojubejuniven.pdfIn PDF document text
    • http://files.lordpulex.com/uploads/1/3/1/3/131379397/9265443.pdfIn PDF document text
    • http://files.seatfm.org/uploads/1/3/1/3/131383727/fiparaderokafado.pdfIn PDF document text
    • http://wuten.lauradsperspective.com/uploads/1/3/2/8/132814946/3845250.pdfIn PDF document text
    • http://folezotux.sbrathcormac.ie/uploads/1/3/2/6/132695388/7342963.pdfIn PDF document text
    • http://files.pascarellabros.com/uploads/1/3/1/4/131406520/muvawoxofes.pdfIn PDF document text
    • http://files.zpchurch.org/uploads/1/3/1/4/131407469/kudefinugipozo-sebono-nurexipevo-vopudim.pdfIn PDF document text
    • http://buxifetow.yourwayweddingday.com/uploads/1/3/1/3/131380011/9258ddfc5dde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3881/3589/files/mamasitagevezasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7373/1741/files/vulaxemuxakebupodido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/free_racing_games_apk_offline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8790/5446/files/whatever_life_throws_at_you_epub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7165/8392/files/88300875312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8513/5014/files/robious_landing_park_kayaking.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DFD 5120 bytes
SHA-256: f76eb023d49abe119662b9b0dda5c5c05f58a904f7641a8d7e8691289f67d727
font_01_sfnt_off0001af88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF88 11756 bytes
SHA-256: f112029974fb68d19ddcfa738e1362473f83b62a85b3878070e5fcfa3b099361

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