Malicious PDF — malware analysis report

Static analysis result for SHA-256 127bcfab28205238…

MALICIOUS

PDF

47.1 KB Created: 2020-09-01 18:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d29a648fe423a603fe3a19b452ae4d16 SHA-1: 05bd03ae0e20732e53e075027735556c79b33765 SHA-256: 127bcfab2820523830ec09f2e34f590b3b9e1b8c225698edf960e3c67e721893
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a known malicious redirector at 'https://ttraff.me/wix?keyword=codeigniter+vs+laravel+performance'. This suggests an attempt to drive traffic to malicious infrastructure, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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.me/wix?keyword=codeigniter+vs+laravel+performance
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_eb184881cb31407da45e654eb608e234.pdf
    • https://static.usrfiles.com/ugd/b28561_03104edca5e14846ba08fc0a458ede18.pdf
    • https://static.usrfiles.com/ugd/704566_10f06594edb44bdcbf8af780eae4098e.pdf
    • https://static.usrfiles.com/ugd/b4609a_8e786c8df99241edb72d222f486b4709.pdf
    • https://static.usrfiles.com/ugd/409ca8_33f7fb1f6c42408a911fef8e4022beb1.pdf
    • https://static.usrfiles.com/ugd/badafb_6a292e2263ca4d43a91b01fb60bf57f9.pdf
    • https://static.usrfiles.com/ugd/41a0b6_8d3b5771bed849c78bfd95bb9a02d299.pdf
    • https://static.usrfiles.com/ugd/3aca14_b16daf8570a849f4b99dc6fea9682fef.pdf
    • https://static.usrfiles.com/ugd/83b1b3_c41651b3ae5a444f91a3809610dad179.pdf
    • https://static.usrfiles.com/ugd/b8c837_c862e4c119e74cb9b57a42d7b0b8f632.pdf
    • https://static.usrfiles.com/ugd/3eed2b_9af266677f5841a7b001cc58a2677437.pdf
    • https://static.usrfiles.com/ugd/54fa57_3cb1d308d17841e4be7c123accd33aff.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_32291abef57144cea822e740515cf9fc.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/palmistry_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40323832667.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/vopivizinezijitegi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ae3.bin
4d7d2135389dc2492a418a1cdaeaf01405a14cd56f6bf7f7d051d5a6345796b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE3 5440 bytes
font_01_sfnt_off00008d59.bin
3f3c7efead8905e5371a949b07bba63a251d79b2ea4b7db5fef5da57868b9bea
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D59 9972 bytes