Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5f90e3732aee05…

MALICIOUS

PDF

36.0 KB Created: 2020-08-30 22:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b75132701deed4a3eb155a4d371a7cd SHA-1: 5a5e56928f8aec4abc3a18b14c8cbdf0aaa731c4 SHA-256: 7b5f90e3732aee05a7423068d4a7d3d4413cc34913c190a844e881be9aa168de
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/wix?keyword=ivms+4200+datasheet', is flagged as a malicious redirector. The document also features a link farm with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed for malicious redirection.

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/wix?keyword=ivms+4200+datasheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b56239_97b343d50c4a44a19ed8f49d10806d18.pdf
    • https://static.usrfiles.com/ugd/c63dba_15bc5f3ab75b49c0a71f78be9879ee26.pdf
    • https://static.usrfiles.com/ugd/40512e_5f31cec466c5420585b6bfff2e377439.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c0e9fdcae2349c7a7723f529029c282.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/keninisebizegetatukin.pdf
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/86906856499.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/13_colonies_map_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/5833/8715/files/lixilel.pdf
    • https://static.usrfiles.com/ugd/07ef24_24182549004041eeb3fd4979e6015474.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_bd7ad2a0d3304424ba4387bc2e6d320e.pdf
    • https://static.usrfiles.com/ugd/6da380_7a024b25b11a4decbd775bbf99abf334.pdf
    • https://cdn.shopify.com/s/files/1/0432/5428/4450/files/risuzulovoxikaras.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3675/files/35926548139.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_off00004fc4.bin
3ae7ffe82b831c9490b40a92d4955dd550c83456ae3fe0e006c50e6d109edda0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC4 5296 bytes
font_01_sfnt_off000061b6.bin
addb89134eed8f04c0640d0a8256d386245fca984a40fdc54b1054818a935f6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x61B6 10060 bytes