Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf22716c1b8ce90a…

MALICIOUS

PDF

43.2 KB Created: 2020-08-29 19:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc7e86fa13cca13feae6ca786b56ba32 SHA-1: 75b68dc45dd07bee28027d29c462992fa2eda902 SHA-256: cf22716c1b8ce90a8337ae5838f87ec839d644226bc39ab50f96be5b75ecd63c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to 'Rainbow six siege renown glitch' and the malicious URL, suggesting a lure to a phishing or malware distribution site. 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.com/wix?keyword=rainbow+six+siege+renown+glitch
    • https://static.usrfiles.com/ugd/b8c837_9aededc51e8842e38f48124ca1d670d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_76103766a10745c29b56f1479b986092.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f2b8e7dab6147c78548b4e5b26f0096.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/serenade_schubert_liszt.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/moviestarplanet_apk_indir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/arteria_iliaca_externa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/pefifubijerajutazen.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/bosusijinupopel.pdf
    • https://cdn.shopify.com/s/files/1/0431/7177/4615/files/getopopal.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/report_on_road_accident_in_bangladesh.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0610/files/computer_awareness_book.pdf
    • https://static.usrfiles.com/ugd/b8c837_3279adcd308141108f647b98d0b30610.pdf
    • https://static.usrfiles.com/ugd/b8c837_f29b2a0d105f4ecba9aed31dac4f6fbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_97715f0395ef4dd58396046bfa7ab6f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_90e518543667433cbb1d34ab83fc318a.pdf
    • https://static.usrfiles.com/ugd/b8c837_76409856b9294693a9f06cf6e0a0edd5.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_off00004677.bin
4b6b666b41c026dd84792b8fb2c0a0287a9d377add204bb289d03f7188693d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4677 10912 bytes
font_01_sfnt_off00006a20.bin
ab549b649f7c69fe48128eb337657a2ff01ec229d57d9c96d9ece8b7c27265b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A20 5368 bytes
font_02_sfnt_off00007c76.bin
09e012051939bbfc3101f9eaf7d7089d68f35376ea9f1a95fdab274c3e024a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C76 9628 bytes

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