Malicious PDF — malware analysis report

Static analysis result for SHA-256 068d4bf93590b960…

MALICIOUS

PDF

71.7 KB Created: 2020-08-23 04:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46dd8af94c13c07e1b1bff2526d7511c SHA-1: a47eb7e07b55efcdc43ab4effeb4588328830c3f SHA-256: 068d4bf93590b96077b82a77c0af033d0fa0294799db98a1392c2b361d6bdcd2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a worksheet and the malicious URL. The ML classifier strongly indicates maliciousness, suggesting the primary goal is to redirect users to malicious infrastructure.

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=onomatopoeia+assonance+alliteration+worksheet
    • http://dibod.environmentalarborresources.com/uploads/1/3/2/6/132695569/5374629.pdf
    • http://kunuruku.breedengallery.com/uploads/1/3/2/7/132740829/7213947.pdf
    • http://files.juliaschombergart.com/uploads/1/3/1/6/131606815/gigamulavezosexoma.pdf
    • http://files.cycleworxflitwick.com/uploads/1/3/1/1/131163846/e4b219.pdf
    • http://files.personalspaceproject.com/uploads/1/3/2/7/132740343/piwepapefa-kavijabojexopi-fuwuwumewa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/0478/8642/files/prognosticator_crossword_answer.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2103/files/teribodareridaletosuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/9461152856.pdf
    • https://cdn.shopify.com/s/files/1/0432/8603/6646/files/sepse_neonatal_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/cantata_142_bach.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/xidalifafanotitevifixiju.pdf
    • https://cdn.shopify.com/s/files/1/0462/3283/0106/files/muvederofoledobegew.pdf
    • https://cdn.shopify.com/s/files/1/0429/0392/8991/files/2007_ford_focus_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/59361759475.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/sopebatomupelisewowole.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/91738166546.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_off0000cff6.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF6 2828 bytes
font_01_sfnt_off0000d9f1.bin
a0bc0ac99ee25a1d30a81adffc078be175e43fe432a60cd1324ed37423394075		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F1 5356 bytes
font_02_sfnt_off0000ec02.bin
5131417208b6675d98b6cb7aaa0d67bac211fc8a0c29236e556bed0e89549472		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC02 10444 bytes

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