Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ded97c8918ec4c…

MALICIOUS

PDF

46.4 KB Created: 2020-08-02 02:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8d5d5d38d6684977a01e3cda356df3a SHA-1: 372d411b716cebbaa3247ec37558c8efa91dc2f0 SHA-256: 75ded97c8918ec4c6a5bcb5c160419b5afe1dddf18c6896c682309d43514d32d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body contains obfuscated text and URLs, suggesting an attempt to disguise malicious content and redirect users to potentially harmful sites.

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=print+no+newline+python
    • http://files.paulgoldberg.com/uploads/1/3/1/0/131070149/wupuzozofifum.pdf
    • http://files.innerheartpathways.com/uploads/1/3/2/6/132681002/46e9335.pdf
    • http://files.yukonshinevalley.com/uploads/1/3/0/8/130814297/morudopodujivu-nedojev-napajilawamit.pdf
    • http://files.poliglowproducts.com/uploads/1/3/1/4/131438405/bekademub.pdf
    • http://files.birdhouserow.com/uploads/1/3/1/1/131164202/c1a8824592b5363.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0767/1447/files/xezoguwil.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/jajib.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2341/files/mikixunuvafomenilerazoro.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/kadokupam.pdf
    • https://cdn.shopify.com/s/files/1/0435/9510/4424/files/38956271415.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/vapof.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/51562419427.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/watch_powers_season_2_episode_9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87195604050.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/95401398211.pdf
    • https://cdn.shopify.com/s/files/1/0439/4414/9150/files/65388148093.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006399.bin
a516fec9b65f872e599e3d09e0f22b814a5dd121cb1be6b9d08c340975377aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6399 4716 bytes
font_01_sfnt_off000073af.bin
6f757d2442848d7bb1878e69407bcbc266b74b2eba6de59a5a848202a9d4cd05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AF 10420 bytes
font_02_sfnt_off00009781.bin
0743f2e1951921ef34ed6956408369f0ddd11ec66c766566a19d3b27861ec4af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9781 16156 bytes

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