Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b100f57d415a4d2…

MALICIOUS

PDF

48.5 KB Created: 2020-08-31 17:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaf01a964e6688f2bbee942ff4b0ea92 SHA-1: 01956b32baa0e06c4e2a55f71329857e789dba30 SHA-256: 5b100f57d415a4d23a54260d339a2c26d3edbfac049308e86f5439ceb7700c96
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating an attempt to drive traffic to malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=celluloid+malayalam+movie+free', suggesting a lure to a fake search result page. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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.ru/wix?keyword=celluloid+malayalam+movie+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_669cf7f73d7d47788a173a295d4e4d50.pdf
    • https://static.usrfiles.com/ugd/b8c837_e89112dd1c914b419281e2aed22d17e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_28a425e369a54c39bbb2a8fcb70a94a6.pdf
    • https://static.usrfiles.com/ugd/4bb894_2b927e7586e34726b98e9e19fc255a20.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b12ed667c8546a8b7cda8764859d588.pdf
    • https://cdn.shopify.com/s/files/1/0457/7918/9916/files/fevewezexezosamafetemad.pdf
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/welumemomobukose.pdf
    • https://static.usrfiles.com/ugd/4d6844_da7c68173d2b4fd0aae56369d3e5eb10.pdf
    • https://static.usrfiles.com/ugd/b8c837_68a5d3c55f344a95a4998d1bb1290c7a.pdf
    • https://static.usrfiles.com/ugd/bfbc46_a315ddac5c014ec6bddb03cc1ada0e1e.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/42036083134.pdf
    • https://cdn.shopify.com/s/files/1/0434/8844/4582/files/example_employment_contract.pdf
    • https://cdn.shopify.com/s/files/1/0433/0556/6366/files/45015254487.pdf
    • https://cdn.shopify.com/s/files/1/0462/7742/7349/files/36343602796.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/jutimala_buragohain_song.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_006_off0000990b.bin
c19577bdb7706f54487adab535958fc657f0043aa2a19c62568f9437e79e846c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x990B 17976 bytes
font_00_sfnt_off0000656a.bin
79b13fb44fe325f1e56b28a4f8834f34f362f8b2df1551e16c6fb7c7a4defd5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656A 4940 bytes
font_01_sfnt_off00007629.bin
f50c430336e91b490be989a010abea465ea36b61450e95774dd9b9bd8588a972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7629 10116 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.