Malicious PDF — malware analysis report

Static analysis result for SHA-256 147843602a83e15d…

MALICIOUS

PDF

45.2 KB Created: 2020-08-31 06:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93c174196944a3d8f666530345fc6b60 SHA-1: e9614ea5dffef4e8679a6a2f044658fb67988f9e SHA-256: 147843602a83e15d8235e6548b95f20b2bdccf5059ee27a169ab4c37e70f4ddb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominently identified as a malicious redirector. The document body, though heavily obfuscated, includes the same malicious URL, suggesting an attempt to trick the user into visiting a site that likely hosts further malicious content or phishing pages. The ML classifier also 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.ru/wix?keyword=garrett+at+gold+instruction+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_cd17f8a3385d460f9024152796aec39e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f59dcc6f09e496f9b992b449d9a0371.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f39526450b84a16907df117671e9271.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/73075531597.pdf
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/pibadodarogivulas.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/duvobixizumubonizeje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/sawakinaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/ruvisefuxubatovawaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/aprendizajes_clave_para_preescolar.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1522/files/tossed_menu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/fosorogovar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0166/files/wujupowibakafibonipo.pdf
    • https://cdn.shopify.com/s/files/1/0444/4097/7574/files/future_dirty_sprite_2_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/vunejiwafezilevajigok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cff.bin
e1d3b2e01c3341c3a2e5b2e0bbee4b70d2213cc7f08e334231b22c2989f14a3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFF 5292 bytes
font_01_sfnt_off00006ee9.bin
2e285026e79911b78af5cecaa389f854e791b2a5248326784bb947f84f0ec26d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE9 10232 bytes
font_02_sfnt_off00009240.bin
2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9240 16144 bytes

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