Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dccd44cd50466a3…

MALICIOUS

PDF

61.6 KB Created: 2020-08-18 21:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a6aa4b2116b77ab446415e38dad13ed SHA-1: 332b5b74024fbdc4559ff0bd4b2d6d14a9e5d3bc SHA-256: 4dccd44cd50466a39b99e50878c570b47918db4955b46147b5e3b524f4de97af
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=volitional+form+of+verbs'. This indicates an attempt to direct the user to a malicious site. The PDF also features a link farm, suggesting SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=volitional+form+of+verbs
    • http://files.grayduckwatches.com/uploads/1/3/0/7/130739789/4299719.pdf
    • http://files.historicwestheight.org/uploads/1/3/0/9/130969364/cc4bc008.pdf
    • http://files.artmattersstudio.com/uploads/1/3/0/7/130775275/rawatumawimadix.pdf
    • http://files.owenyelland.com/uploads/1/3/1/6/131606393/2530184.pdf
    • http://files.malcolm-morris.com/uploads/1/3/1/4/131437276/xutow.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/44843290087.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/joxola.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/genentech_capacity_planning.pdf
    • https://cdn.shopify.com/s/files/1/0429/5652/1631/files/xaxinetowogerozexowila.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/mujoruvenu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3331/files/lafakevogejerijujiwamab.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/81984861381.pdf
    • https://cdn.shopify.com/s/files/1/0437/1628/0475/files/xinukejovevatugizexil.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0426/files/exponents_and_powers_worksheet_class_8.pdf
    • https://cdn.shopify.com/s/files/1/0433/1002/2814/files/linapomuwe.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007301.bin
9f399710d96da8669b2596cb0f5ab5708aa0aec0b1ffc064eac589f5e7536067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7301 11712 bytes
font_01_sfnt_off00009926.bin
d69bae3d6e0d886b0bf275d74ce33886fa8bba590147efe624880c14aa493685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9926 4868 bytes
font_02_sfnt_off0000a992.bin
73627f9ad7b7e042b114c18162c7e4d10c005ffb60a63f780fda412d57e6f568		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA992 15160 bytes
font_03_sfnt_off0000d903.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD903 4324 bytes

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