Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2ccc1a06e87d21…

MALICIOUS

PDF

50.7 KB Created: 2020-08-31 23:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f27eb28563da04c2cb43466578b87bc SHA-1: ecda22ed7e147335f547139493da9e23c4c5d8b5 SHA-256: 0a2ccc1a06e87d21716580427c5167686b611fec4ebf9a2f706a435c9c683ae9
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous other PDFs hosted on Shopify and other domains, with one primary redirector URL identified as malicious. This suggests a tactic to manipulate search engine results or distribute malicious content through a large number of seemingly benign documents. No scripts were extracted, but the presence of embedded URLs and the PDF structure strongly indicate a malicious redirection attempt.

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/pify?keyword=coplanar+waveguide+with+ground+characteristic+impedance+calculator
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/mibawedediw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/sample_application_form_south_korea_visa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/princess_jasmine_coloring_pages.pdf
    • https://static.usrfiles.com/ugd/3bca44_955b8deca7414b3d900d9b7d8b10e4c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a6ec84b551244b7a8abb88feec3d9f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_16fed4493c3343ef977bce96d70c86e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d963c41c3254c718a19e9826dba365e.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_3d5e3a0877e542a3b52cb21d5b251f4e.pdf
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/red_werewolf_hunter.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/adblock_plus_android_extension.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/43055153951.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6a9e8a912694c90b04776d45c4eebdb.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc43c206111048d5aae78d6915483bf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_a23241459776485abba258e43c3cd658.pdf
    • https://static.usrfiles.com/ugd/ddb60a_3e10e75a1245418c81122e4b7beeb2f1.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://www.gnu.org/licenses/gpl.html
    • 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_off00005c38.bin
05728499c453803eec60427ccbf6e83b20c0148be8986549a2863e6cb77e0ab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C38 5544 bytes
font_01_sfnt_off00006eeb.bin
465d3e617c5b9f7aa7ea8fd0454ebb6bfc8c98dbd0a1c0b0906273c75a3fbb35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEB 6816 bytes
font_02_sfnt_off00008159.bin
aca6e0c782755a5a4a71a9fbe375d8559b34b7ef25e562351a2f5f6b6a187949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8159 11512 bytes
font_03_sfnt_off0000a789.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA789 16092 bytes

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