Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb849fd9fba17ad…

MALICIOUS

PDF

44.7 KB Created: 2020-08-08 07:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f726bd5f87916dcf593359abf3f8d197 SHA-1: a7fd85112716c2f2049def1e5ca723af0130bff1 SHA-256: 8eb849fd9fba17add8c63c55deb349f0c34557c91c5cb3f75c412021c0deef48
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes text suggesting it is a lure for 'bohemian rhapsody sheet music violin pdf'. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware download. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=bohemian+rhapsody+sheet+music+violin+pdf
    • http://files.enzobrand.com/uploads/1/3/1/6/131606000/duwizu-pewizitipe-sokep.pdf
    • http://nugaz.goodmovemedia.com/uploads/1/3/2/6/132683014/rupoxunezof.pdf
    • http://files.lucycampbell.net/uploads/1/3/1/3/131380158/nobufamakaxaxe-kenupewel-nazusit.pdf
    • http://files.crazycurrchic.com/uploads/1/3/1/4/131483025/zevesomeb_tugagekupore.pdf
    • http://files.artstudiobydesign722.com/uploads/1/3/1/4/131409574/2918390.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/veritokefadaxepovovunevex.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/24614902761.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/drop_dead_babette_cole.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/kapigago.pdf
    • https://cdn.shopify.com/s/files/1/0436/9114/7417/files/rizilinupapamadared.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/74300244327.pdf
    • https://cdn.shopify.com/s/files/1/0439/9320/2846/files/iron_deficiency_anemia_journal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/51086938482.pdf
    • https://cdn.shopify.com/s/files/1/0436/5202/2430/files/flo_rida_my_house_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/62370720348.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/centroids_statics.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/milozexujamubiwamujane.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/93632526925.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_off00006e91.bin
7d69eb576c828a466f5ba0b079f4a1af47b6da27df1af5746a8199451ca84afc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E91 5608 bytes
font_01_sfnt_off00008189.bin
236a611be836e96f0444dbe2b340185f8e68f3adfe4244e59460ab0e8f8a2d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8189 10324 bytes

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