Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd06401282e35e14…

MALICIOUS

PDF

44.7 KB Created: 2020-09-18 12:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa840d9777fff58934ecf4d40e68e8e3 SHA-1: 9f9b58de3101cb7ab8803f76209e25f980d47bd9 SHA-256: bd06401282e35e1477c07545730aeb9d889886c61b86773a5975f1baa42eb362
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests a link farm or redirection attack. The primary malicious URL identified is https://ttraff.me/wix?keyword=lemonade+world+ratio.

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.me/wix?keyword=lemonade+world+ratio
    • http://xuxiwoz.arklatexoffroad.com/uploads/1/3/1/4/131452842/e8ca3292.pdf
    • http://vijubaru.santosayogaandhealth.com/uploads/1/3/1/3/131378776/15a348031b.pdf
    • http://fijufa.crossfitharborsprings.com/uploads/1/3/2/6/132681692/528b34.pdf
    • http://files.thekingdomisnowgreat.com/uploads/1/3/1/3/131378950/7129878.pdf
    • http://xapiro.mysecretmuse.services/uploads/1/3/1/4/131406286/dibaburigobikat.pdf
    • http://zojit.aayfitnessandyogabyjamie-dee.com/uploads/1/3/2/7/132710497/55fcc.pdf
    • http://zomilev.hamlintownshipmi.com/uploads/1/3/1/8/131859042/mamow-xuzej-kudiboguwux.pdf
    • http://jedod.otahealthmateirving.com/uploads/1/3/0/7/130739919/falogemo.pdf
    • http://files.longchronicles.com/uploads/1/3/0/7/130776503/2426798.pdf
    • http://gerebib.jubileepainting.com/uploads/1/3/2/6/132680799/murezabipuxafo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1461/files/tuff_torq_k46_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4188/1253/files/mod_cheetah_gta_sa_android_dff_only.pdf
    • https://cdn.shopify.com/s/files/1/0457/7129/2838/files/romawupaluwovuzoxabusodi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/learning_styles_quiz_for_elementary_students.pdf
    • https://cdn.shopify.com/s/files/1/0461/7096/4131/files/dr_dre_compton_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0459/2772/7271/files/cars24_inspection_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/91018296142.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_off00006fe9.bin
51d9779a87ffaba27affc3a1902640939df9520aa2dc5e5be93e0f6b4b327ca6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE9 4828 bytes
font_01_sfnt_off0000804c.bin
5ef71d632d8d3cd445ffcd10b0d42f6d9701c8d3ed6f2b9bf8c36b039c6707fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804C 10948 bytes

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