Malicious PDF — malware analysis report

Static analysis result for SHA-256 0772063f5c7a76cd…

MALICIOUS

PDF

41.6 KB Created: 2020-09-04 10:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e06150bf6665b6742bb30a980472658c SHA-1: ce99453462532a0e5618e3463dc8f3d386f50dab SHA-256: 0772063f5c7a76cd45626691fcf3ea9e2c9276cf22625b90cbc295e73ebc3114
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of a 'SE_DOWNLOAD_BUTTON' heuristic indicate a social engineering attempt to trick the user into clicking the malicious link. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wix?keyword=all+about+me+worksheets+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3123/2666/files/big_fish_games_hack.pdf
    • https://cdn.shopify.com/s/files/1/0429/2159/0951/files/87067388475.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1425/files/reporte_alumbrado_publico_merida.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/figonegesowebazajis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4203/7150/files/of_306_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/the_good_morrow.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/89024526301.pdf
    • https://cdn.shopify.com/s/files/1/0432/8770/7804/files/62911945420.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9066/files/gudinemagireviza.pdf
    • https://static.usrfiles.com/ugd/cec570_9c468edb44b14e80b36e8eeeacf95d11.pdf
    • https://static.usrfiles.com/ugd/23e9be_863688b15fd246be90242e44e1e4919e.pdf
    • https://static.usrfiles.com/ugd/33ab24_d54ab496f06841ae811ed47a03d1a9b8.pdf
    • https://static.usrfiles.com/ugd/1cfe37_f31de7238be74b55a0d90b36ea6bc9da.pdf
    • https://static.usrfiles.com/ugd/10a4aa_926bd80b75db4a8b8a9f7fe7fedd3605.pdf
    • https://static.usrfiles.com/ugd/696b8a_5d192d07a9554c189d897f4574f60494.pdf
    • https://static.usrfiles.com/ugd/9ced5d_0d93c806ac5d4955944972d21b6c60a2.pdf
    • https://static.usrfiles.com/ugd/b1277d_dba3c6bdb092483a8e56bf0fbd76fb34.pdf
    • https://static.usrfiles.com/ugd/2f7815_c0c0bcf8cf234e7eafebee9d6d82e789.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006545.bin
2ac729d35ad197f2f73298b90e3c6ba8eba655f317d35efff046bbefa6ea545f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6545 5292 bytes
font_01_sfnt_off0000772c.bin
13b6589848524ce063d513a3b9feaf8288bc3f3ea363726ed6b39c7a78d2f04f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772C 10008 bytes

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