Malicious PDF — malware analysis report

Static analysis result for SHA-256 712cbe39d3823e4c…

MALICIOUS

PDF

64.5 KB Created: 2020-07-26 11:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 369dd636c76ab84e6ddea8a6c87b9b96 SHA-1: a2a1b4e421dc3c6fad73923e2a46c0efa610ce6e SHA-256: 712cbe39d3823e4c57cc72b303126ee8759f3fba47c4858803e068ab6556f9cb
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=chunkzz+movie+audio+songs', which is likely used to redirect users to further malicious content. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic. No scripts were extracted, but the PDF structure and embedded links strongly indicate malicious intent.

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/pify?keyword=chunkzz+movie+audio+songs
    • http://files.clarevet.com/uploads/1/3/0/7/130738814/6baf8b64a8319.pdf
    • http://files.thefirstgenlounge.com/uploads/1/3/1/0/131070692/sevifafuganos.pdf
    • http://files.drydenpres.com/uploads/1/3/1/8/131872015/9a94af.pdf
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/nerevinagelobud.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/68659020021.pdf
    • https://cdn.shopify.com/s/files/1/0432/1797/7504/files/27822708073.pdf
    • https://cdn.shopify.com/s/files/1/0434/2372/7783/files/gizamujusegirulavabugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/82133168239.pdf
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/23610391261.pdf
    • https://cdn.shopify.com/s/files/1/0434/6278/7237/files/93913902440.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/36194281252.pdf
    • https://cdn.shopify.com/s/files/1/0437/5861/6733/files/pebabagogule.pdf
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/refimodifexonud.pdf
    • https://cdn.shopify.com/s/files/1/0436/1804/2018/files/dovexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/gugagemomunud.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/mibifofukudowixumop.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/lomadekikilixedekiwatu.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/
    • https://gitlab.com/smc/meera/blob/master/COPYING
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009b79.bin
1ca4b1efc92c1778bb7e4dc651f6e3f567cbe2161f4df3734504d538638e31fd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9B79 6748 bytes
font_00_sfnt_off00008a46.bin
3605fff88a748a17bcf19e6c87dbbee880889a075f766d055e732a12fab589fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A46 5108 bytes
font_02_sfnt_off0000b2ad.bin
f4932ed99d1af02049ae55d6b26dad0572da7a338358b2a793e08789257661aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AD 14016 bytes
font_03_sfnt_off0000dee5.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE5 16164 bytes

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