Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a6c58c468ce942…

MALICIOUS

PDF

55.0 KB Created: 2020-08-30 21:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3ea0eeb9771fdfcc144e28eccbe813b1 SHA-1: b76130bdf6e5fec6e0936f54d992fc2222d64e39 SHA-256: a5a6c58c468ce9429068868438c7c04409b363163f61094eda246c5044c96481
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'ttraff.link' domain. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests an attempt to manipulate search engine results or lure users through deceptive content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack.

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.link/wix?keyword=a+wild+sheep+chase+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1097/files/atomistique_s1_pdf_svt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0357/4434/files/battle_royale_novel_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0732/6882/files/string_format_integer_python.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9ed621cae4ff4374b95ba5c56f3b0acf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c817e777ffad4352919e13822e8f704a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2b3f46_c51ac9e935424327a27859b4c5902ffb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fcd7010f44864e0495c381b9c7c8127f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2f7815_15aebf636d1a47879e11324f2adf784e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2b25b5_b5d0bc398a9549cfa07ea3e2b2c4e8c4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dc98cc_c18482cf971a41aeaf747e269c06d9bf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7d21c0_af17295077ea451ea197a03e2f20d9e8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dc1abbd80ee14658a750bf16668a3a80.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7394 11600 bytes
SHA-256: 5be7c2d18ad31854011f6d68eb0cd8af7a0c0e93525effbe38144f3dc95decb7
font_01_sfnt_off000099ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99EE 5228 bytes
SHA-256: adf65b6650615b86f70ddaff34ae86a78ada1d6a136cbb3cbeacd1b956af5e95
font_02_sfnt_off0000abc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABC0 10664 bytes
SHA-256: 68000dd665fe9f3de6acb95e92c375afdd7779a78fd8d70578219710b8108da0

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