Malicious PDF — malware analysis report

Static analysis result for SHA-256 82eb59f3248fdb9d…

MALICIOUS

PDF

52.3 KB Created: 2020-08-29 21:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2886d1190ab410d8963a475d593cbfa SHA-1: 384f67e3803baf9a20ae89ef357ac3926a7d4357 SHA-256: 82eb59f3248fdb9de6a9e3daa41de67bf4e7a234cf4aea592934bf13a2984e4a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains numerous links, including one to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Jquery tutorial w3schools pdf download', suggesting a lure to trick users into clicking the malicious link. The presence of a link farm and the ML classifier firing further support its malicious nature. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.com/wix?keyword=jquery+tutorial+w3schools+pdf+download
    • https://static.usrfiles.com/ugd/0adedf_7b374c8c084e4bb1aa48224fcb8b9c58.pdf
    • https://static.usrfiles.com/ugd/5ad03d_384a1da2ad8348fcad657a9d7810bf2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ecd898ac8d74c389ba3a94c5d426505.pdf
    • https://static.usrfiles.com/ugd/299074_3bf7ec0e48ff46e0980927759c0ab71c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e51eb82ffb154d6ea71517379899237c.pdf
    • https://static.usrfiles.com/ugd/b8c837_af6b54b025fe416da52ec83a393ae1ad.pdf
    • https://static.usrfiles.com/ugd/bf650e_664765d4f2bb4c049d7150a380f0b0c3.pdf
    • https://cdn.shopify.com/s/files/1/0433/6510/5814/files/5082344776.pdf
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/sejudolofo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fimovubonivunab.pdf
    • https://cdn.shopify.com/s/files/1/0436/0011/7928/files/blowin_in_the_wind_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0434/9820/9446/files/complex_buying_behavior.pdf
    • https://static.usrfiles.com/ugd/58a813_92287b455b444433aa061fea99a3775e.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_05dd983c01104df1bfb59037772e7610.pdf
    • https://www.w3schools.com/w3css/4/w3.css
    • 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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006775.bin
76c8363473ab8acdf4c17ed584394d96536a9aeac5c428b04fc2df508525127f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6775 5600 bytes
font_01_sfnt_off00007a9a.bin
26d74f002e441f830a46d0d6f04f92d17defd709d4bf70482b42a03cd080c77f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9A 11376 bytes
font_02_sfnt_off0000a082.bin
fff8b70d67420864e2a263fdbbaad35efae781e73a516d3cf38207748e8715b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA082 16088 bytes
font_03_sfnt_off0000b536.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB536 4324 bytes

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