Malicious PDF — malware analysis report

Static analysis result for SHA-256 03fed05f8cf0063d…

MALICIOUS

PDF

45.9 KB Created: 2020-09-01 05:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 742bea85880f28d61a2516a5ef95d4b8 SHA-1: 0773fb37e3c281d833bd6aa7f770263f9ec7253b SHA-256: 03fed05f8cf0063d38240b0a748962cba858d1d8b87bded0517911be90322b51
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is 'https://ttraff.club/wix?keyword=beautiful+youth+2014', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a social engineering attempt to drive traffic to malicious sites.

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=beautiful+youth+2014
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/temowoxejepoxom.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/benepomofijidoteroko.pdf
    • https://cdn.shopify.com/s/files/1/0438/5135/0166/files/39069634778.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53551688275.pdf
    • https://cdn.shopify.com/s/files/1/0433/9145/1294/files/65381805067.pdf
    • https://static.usrfiles.com/ugd/b8c837_71f729a6cd084929a663a34438542b81.pdf
    • https://static.usrfiles.com/ugd/963627_31f6c2e966404137904551f3b5ead53c.pdf
    • https://static.usrfiles.com/ugd/4117a9_e63b0a1dacdb451998535eefa858d22d.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ab783d66b624c129b02028b7d30d5db.pdf
    • https://static.usrfiles.com/ugd/d4da64_c6d6fd04cffd499fa22add7ad9f33bec.pdf
    • https://cdn.shopify.com/s/files/1/0431/4693/6482/files/38258140243.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/fajopu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/gezomif.pdf
    • https://cdn.shopify.com/s/files/1/0434/6717/8134/files/wamagan.pdf
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/96041283276.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/2437961837.pdf
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/les_analyses_biologiques_du_sang.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/xomemojizosinisuzumuxab.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000090e6.bin
6b8a8f1ee99908c72bf0ccf71ed4252fc2e97ce2e8b58bd24fc32fdae0f65875		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x90E6 16888 bytes
font_00_sfnt_off00005c7e.bin
cb3b2a315fa991d2aef2cec9dd0eb93c6770af798755d964700327a2de7c703b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7E 5144 bytes
font_01_sfnt_off00006e16.bin
4ff5000ce8a6034ae97e58949eed17b17b48ca1e6d73352e3948dd80c4447cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E16 10152 bytes

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