Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1cdedba8b953bd…

MALICIOUS

PDF

88.1 KB Created: 2020-08-04 18:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d736895ef7c513b90ee78a4a9e1bdeb2 SHA-1: ebe8dcfbd385c891cb0ef5ae45d6b289e4bd2806 SHA-256: 1b1cdedba8b953bd09728ea410049e04876d2953aa9d4a13de89d0ac88daa22f
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=biogas+plant+project+in+marathi+pdf', suggesting a lure for users interested in biogas plant projects. Another heuristic identified a large number of external PDF links, with the first being 'https://cdn.shopify.com/s/files/1/0434/9054/1733/files/ragoligavofemilovunobid.pdf', indicating a potential link farm or distribution method. 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=biogas+plant+project+in+marathi+pdf
    • http://files.sheltonmetal.com/uploads/1/3/0/7/130739039/7959413.pdf
    • http://files.herbheathmusic.com/uploads/1/3/0/7/130775866/6234286.pdf
    • http://files.yoursevenproject.com/uploads/1/3/1/3/131398123/fowodugifiz_memode_danaluwijorosol_jowifiri.pdf
    • http://files.parvathyprem.com/uploads/1/3/2/6/132695418/zefafo_kuzikamofamapit_majisututurufa.pdf
    • http://files.clearlakedebate.org/uploads/1/3/2/6/132681294/poradapifon.pdf
    • https://cdn.shopify.com/s/files/1/0434/9054/1733/files/ragoligavofemilovunobid.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/zuloxibijexano.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4828/files/88794571154.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/ziwexalosukedojofupopaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/fejudonowidepowuriperaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/ib_biology_course_book_2014_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3585/files/kobenonit.pdf
    • https://cdn.shopify.com/s/files/1/0435/5856/8097/files/vafugotikevabugazutis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/76989234785.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010321.bin
d9b87e34aaf0ea6d2e0b1669eac58abd618df8e504ec87c98afde8dec56243c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10321 5696 bytes
font_01_sfnt_off00011668.bin
e0a08bc66546a0efa7cd9e16e09a7669b55777f64420a90df74e271ec54d9c20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11668 15548 bytes
font_02_sfnt_off000145df.bin
d5dc42aae4a247aad3c983bbe8ba70c2c24db5b11c8364a4d7a450a2bfba1cc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145DF 3252 bytes

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