Malicious PDF — malware analysis report

Static analysis result for SHA-256 27764cb07a638673…

MALICIOUS

PDF

74.4 KB Created: 2020-08-29 20:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2775fbb26a70a986c0d49f534c643647 SHA-1: c8de4cb8f2e5e6963abfeeafbf1363f623fce973 SHA-256: 27764cb07a638673cfa847048e75bbb28ae13ca046a732da26a08f1ea6c33117
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a transcript for 'Jimmy Neutron Birth of a Salesman'. This link, 'https://ttraff.club/wix?keyword=jimmy+neutron+birth+of+a+salesman+transcript', leads to a known malicious domain. The document also functions as a link farm, pointing to numerous other PDFs, likely for SEO manipulation or to spread malicious content. The ML classifier 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.club/wix?keyword=jimmy+neutron+birth+of+a+salesman+transcript
    • https://static.usrfiles.com/ugd/0049ca_0e7fdca16491473ebcb27ca458fed3da.pdf
    • https://static.usrfiles.com/ugd/b8c837_869f289aadad4a5c8a6094dccc426d03.pdf
    • https://static.usrfiles.com/ugd/b8c837_92488ebecacd42a48bb8969f0ff89d03.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8558/files/67686760974.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/74450559335.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/cookie_clicker_dashnet.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/devi_bhagavatam_malayalam_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/guided_pheasant_hunting_minnesota.pdf
    • https://static.usrfiles.com/ugd/0d002d_128e1577ee8743fdb1027ed409a3b6b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a227b7e916a457b9ae8e2dbba4cf81c.pdf
    • https://static.usrfiles.com/ugd/b8c837_98a330be0f8a412cbd134df2c0a42fea.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a9305f6588b4474adc7c5e9845fe4ff.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/33807392237.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/pirilarulozepowajoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/5372/6358/files/xopitovu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6735/6824/files/free_printable_september_2018_calendar_template.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_off0000d221.bin
af7c36229b0bd5348e5a84bb19a54d901271ffcb9248667a2009c40a87c30aa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD221 5368 bytes
font_01_sfnt_off0000e42b.bin
90226113bb703b9b8c5812b5c267b8bfbf8e28d3ade09de39618dbb4ef6b7423		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE42B 12940 bytes
font_02_sfnt_off00010db3.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB3 4324 bytes

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