Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebc05febc441785…

MALICIOUS

PDF

114.2 KB Created: 2020-08-04 01:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53a8f4505544a3e1455c08c9155e1ec5 SHA-1: 5013429e66ee78f3bb27da01a32e5da072a5b349 SHA-256: 0ebc05febc441785a966b616b87ff2075bda389c7d2f66f9e7478a4e9f185306
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 identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme. This suggests the file is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=samsung+company+introduction+pdf
    • http://files.cheffurdell.com/uploads/1/3/1/1/131164417/webabewin.pdf
    • http://files.ardancenetwork.org/uploads/1/3/1/1/131164419/ac31b9ef8.pdf
    • http://files.abonart.net/uploads/1/3/0/8/130814297/c6565b6972.pdf
    • http://files.tommieshelby.com/uploads/1/3/2/8/132815004/wulovug_nigoke_nexiwadewe_tanezije.pdf
    • http://files.indianaaeop.com/uploads/1/3/1/4/131407284/kijavudejek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/29910311904.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/zitotawubutejab.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/29863186763.pdf
    • https://cdn.shopify.com/s/files/1/0436/3006/7865/files/23672913233.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/90250783965.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/34110220186.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/42290649147.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/86982640385.pdf
    • https://cdn.shopify.com/s/files/1/0439/9667/6254/files/tale_of_two_cats_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/pozexot.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/xoguxatebuguforila.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4245/files/ti-_89_titanium_manual.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000138c0.bin
b38bfc3866eb7f3001f397f797e873833dedb8eb70b985d30553829b76a8f7df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138C0 16108 bytes
font_01_sfnt_off00016bf1.bin
d7b0ebbd52104e06d4fd8edaca5fa7954bb95743d6084595d46828d290c7c420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16BF1 5648 bytes
font_02_sfnt_off00017f23.bin
4a54ce30b0e03c60071a8dddf87e629e1c43279a02763d1cc082e829b14a1baa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F23 11236 bytes
font_03_sfnt_off0001a58d.bin
46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A58D 16120 bytes

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