Malicious PDF — malware analysis report

Static analysis result for SHA-256 1236e25338ca4a4c…

MALICIOUS

PDF

49.5 KB Created: 2020-08-30 08:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d480f59108a62263220eaeb31041489f SHA-1: 3395735b29c1eef716a10322a4a2e2ca42639c7e SHA-256: 1236e25338ca4a4cd5212d5d00632dd8b3cbc2c731c6b8a34f85e854a3a6384e
202 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text fragments and URLs consistent with an advance-fee scam, specifically mentioning 'new york theater tours' and linking to a redirector. The presence of a link farm and a lure for a download button further supports a malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=new+york+theater+tours
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_60f941783ff54948925393a1e465d837.pdf
    • https://static.usrfiles.com/ugd/b8c837_617fdbd2671548e68497e571a57e0c68.pdf
    • https://static.usrfiles.com/ugd/b8c837_10d67812611b4847826248b5193855b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_b88d344323bb46cabc741122bd7c87af.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2054b899cf84fc094ad39843c379632.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2277/files/catch_it_bin_it_kill_it.pdf
    • https://cdn.shopify.com/s/files/1/0434/6914/4230/files/muvabeve.pdf
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/vupuzulujabulagepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7602/6522/files/rekesobinapuvurewave.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/mukesezekoribukok.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_11a1388841fb4f2fa25891ddbf820976.pdf
    • https://static.usrfiles.com/ugd/dd4472_68285f9877dc47629e064f1fe1b38eed.pdf
    • https://static.usrfiles.com/ugd/7598fa_bf56dc7f483841e9ab5f70821776fdca.pdf
    • https://static.usrfiles.com/ugd/41a0b6_ead0514307494645b590eddd60bd0ee5.pdf
    • https://static.usrfiles.com/ugd/b8c837_85e335e89242484e805564d06a3c0338.pdf
    • https://static.usrfiles.com/ugd/d5415a_0de8da1de21b4076b76dea7d3d61387d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0c3c45da79249788ec0ee31b601bc21.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_off000084e9.bin
3ebf70cea3e3a6da4337effe5964d526f75ddee435eb6e072982db9c1a329465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E9 4968 bytes
font_01_sfnt_off000095e5.bin
7dfa731436e5996f7835d2f966e4f00e56f20fe1ed7e237a12f93286a3496897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95E5 10468 bytes

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