Malicious PDF — malware analysis report

Static analysis result for SHA-256 139f3271513fe80d…

MALICIOUS

PDF

43.5 KB Created: 2020-09-17 19:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41f80db817b981138f9b2aeb2c42b1a7 SHA-1: 1a3aded14ad7274e7f2835e69bedf5094522eb73 SHA-256: 139f3271513fe80d654c3acd258f18ac5ec53947615bb1632b2e940cc6bc43ca
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with one specifically identified as a malicious redirector: https://ttraff.me/pify?keyword=kingdom+2+crowns+all+mounts. The presence of a large number of external links, many pointing to PDF files, suggests a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/pify?keyword=kingdom+2+crowns+all+mounts
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://70985520-c65f-4a63-b6a4-156d8faf0389.filesusr.com/ugd/bb05c1_1f17d718837d4d51bb1efd015a7852c1.pdf?index=true
    • https://548fec2e-ad9b-4c55-bc49-b1953670703b.filesusr.com/ugd/7a359d_34283383d3ce4bd4a97851c5ea79030e.pdf?index=true
    • https://860979a0-6841-4f93-84ef-3d2ca04d3a3b.filesusr.com/ugd/f6336d_5dc0f40590454e00a449991760043a0b.pdf?index=true
    • https://a990c7d4-c9c4-4319-94e5-af27fbe73b28.filesusr.com/ugd/4329d7_0b263fced4d44d75ad16b594e442dec4.pdf?index=true
    • https://d7c32de5-75ce-4874-a8fc-305f4a577fab.filesusr.com/ugd/40512e_79f5c630e0b34c88b078545a12489c17.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/0416/5276/files/construction_project_monitoring_report_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/9709/5333/files/towajepizibefavutazupiki.pdf
    • https://cdn.shopify.com/s/files/1/0448/2636/2013/files/how_would_you_characterize_yourself.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/mejomotazoxuruziguj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/kujofivuwidimedadozefusaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/gidudagekidujokuwosovo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/avril_lavigne_all_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/26279854507.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/california_physical_science_textbook_8th_grade.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_off00006c45.bin
ee13393865ff1bf98f0d50f2fcb5ee20b6d2c7b09b8857c7e90ede1f1b34d697		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C45 5452 bytes
font_01_sfnt_off00007ed4.bin
84c8fdf2314aecc03a155e275c33628ca964efdad62b6e1aac374cffc6131c65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED4 10192 bytes

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