Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b11180e41f1a3cb…

MALICIOUS

PDF

52.3 KB Created: 2020-08-01 11:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27c3bccf9b1667d6502e6630fd77e668 SHA-1: fae8708504d5e146715296534f7372573f72cc63 SHA-256: 7b11180e41f1a3cb3db146d05b48d2709a39b78e588dcf46a8ffea70cd1c4e77
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=atom+jsx+plugin'. Additionally, it exhibits characteristics of a link farm with numerous PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs and the nature of the redirector suggest an attempt to lure users to malicious content, likely for phishing or malware delivery.

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=atom+jsx+plugin
    • http://files.ellvenus.com/uploads/1/3/2/6/132681901/suzorefefoju-rosorizemogo.pdf
    • http://files.mayaminocha.com/uploads/1/3/0/7/130740510/luderoforuluxopin.pdf
    • http://files.nourishyourpurposenow.com/uploads/1/3/0/7/130775137/302208.pdf
    • http://files.heartofcoloradofiberartsguild.org/uploads/1/3/2/6/132682829/8276d7b8a9ef.pdf
    • http://files.erinmillermassage.com.au/uploads/1/3/0/8/130874676/05385a0d0d52d5f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/5380755998.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/narezosawasajegekemuwori.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/15369473923.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/vememabodikexirot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87678197609.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0170/files/vowezegelerukeko.pdf
    • https://cdn.shopify.com/s/files/1/0429/1215/3766/files/lasog.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/30902329896.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/67703209997.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/55361969342.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/6480593021.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064d2.bin
54467087088d56d30f0f8a20c53ed631b689fe64cd76ee0952b684b919c39776		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D2 4964 bytes
font_01_sfnt_off000075b2.bin
6e8d8b98921ce00f99e4b0fea5b41d794c5830bf2687246f0b47fc950b39fe7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B2 14740 bytes
font_02_sfnt_off00008a6f.bin
b4594a96e031f71f20ffd7fc599809a2307f085e2aea00b076609c530170c54c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6F 10192 bytes
font_03_sfnt_off0000ad67.bin
ddcc2e3b4372182aeb69f1b0269487942b3eb56577f659819938dddb9e35c052		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD67 16576 bytes

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