Malicious PDF — malware analysis report

Static analysis result for SHA-256 04031f3116985a49…

MALICIOUS

PDF

52.1 KB Created: 2020-08-30 16:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72d6d5d82930c1c4fa6fced831f86ded SHA-1: d17da9851077cdcffe95343bf20cce1be2d6a765 SHA-256: 04031f3116985a49e23c0eea88684932b125afce62320229564ad8ecb3106b1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a search result. This suggests an attempt to lure users to malicious content. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external documents, likely for SEO manipulation or to distribute further malicious content. The ML classifier 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.cc/wix?keyword=quran+dictionary+with+urdu+translati
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_7a2f1bb028824d18b235d7011b930a57.pdf
    • https://static.usrfiles.com/ugd/5ed537_357bfd1e290149648d17369206ce14cb.pdf
    • https://static.usrfiles.com/ugd/de65f7_a93f78861f1e4233a0b4aa67169774ac.pdf
    • https://static.usrfiles.com/ugd/22bf55_2d8a305ce8004beea453c9db26f16fd0.pdf
    • https://static.usrfiles.com/ugd/34ec99_15ce7d09996844e3bf83bcccee9e9b60.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/40651056104.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9162/files/aritmetica_su_aprendizaje_y_enseanza.pdf
    • https://cdn.shopify.com/s/files/1/0436/9917/5579/files/wutowed.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8503/files/duvimikufezikawetep.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/34882003791.pdf
    • https://static.usrfiles.com/ugd/04e6f9_18d87fe00ac8460aa46986016a93b278.pdf
    • https://static.usrfiles.com/ugd/b8c837_e03b998dd02543e581a86a6f2010f241.pdf
    • https://static.usrfiles.com/ugd/a771bd_9b339d493783462885897d1676de5293.pdf
    • https://static.usrfiles.com/ugd/2c8d66_1cd4e7a21b704f878cf6dc3fb01bcd72.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009146.bin
80cec77854674060c67ef68b577e5ccd68b0ed79dbb7c75ef741ceb0bf26e989		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9146 21092 bytes
font_00_sfnt_off00005b8a.bin
d40254a6951130ec41f1dfa1239d29697bca7b92ba89386f586bfaeb28ce3b1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8A 5044 bytes
font_01_sfnt_off00006caf.bin
22b46504ce6f5a307cc3875e15608e7bd9de605e1a6fc464f7220d682f581e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAF 11280 bytes
font_03_sfnt_off0000b4e9.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E9 4324 bytes

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