Malicious PDF — malware analysis report

Static analysis result for SHA-256 113eec95e71c7240…

MALICIOUS

PDF

44.4 KB Created: 2020-08-19 16:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cec4a66375dfcf3537c9e61a5117213 SHA-1: f5b8b9172502b4c2898c93e341701f372687f4b4 SHA-256: 113eec95e71c7240a0d48c442da75b28173d6b6ba920f6edf3d51b9065c1e304
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One of the primary links directs to a known malicious redirector, indicating a malicious intent to lead the user to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=introduction+sur+l%2527+automatisme+industrielle+pdf
    • http://jugojapit.midwestmusclebullyclub.com/uploads/1/3/0/7/130776760/7404094.pdf
    • http://mumapasun.malenyretreatweddings.com/uploads/1/3/1/4/131437246/mudize-jurewuteloju-jemulezowigar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/5264/5017/files/adeptus_mechanicus_codex.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/nilovixupiwetepokarofil.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/wowarenalinuzunawox.pdf
    • https://cdn.shopify.com/s/files/1/0455/3284/0101/files/hsc_marksheet_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4869/6993/files/chrome_canary_linux.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/bawuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3710/6087/files/gst_amendments_for_nov_2019_ipcc.pdf
    • https://cdn.shopify.com/s/files/1/0434/9224/5656/files/nuwinabu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/cellule_vgtale.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/45439074565.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/45827111394.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3452/files/wivewigo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058c8.bin
e218f02235c6114317d130e80a799088d6c3f0a0c74a132afe43c09dbd049f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C8 5152 bytes
font_01_sfnt_off00006a32.bin
3a296d1367d3c05407cfd3cff494eeefcbd40e30c03e3d83e3671fd8cacfb5a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A32 13940 bytes
font_02_sfnt_off0000963d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x963D 4324 bytes

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