Malicious PDF — malware analysis report

Static analysis result for SHA-256 12123bca5ca85a2b…

MALICIOUS

PDF

42.2 KB Created: 2020-07-10 20:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: aebf71100e57b9db96b20fdc030cdd20 SHA-1: 145b4a4fd9756e7e4e7d09aaa03760e07e495a33 SHA-256: 12123bca5ca85a2b908ba12ddfd4bc411fcef99fbe830627888247a469f11a00
184 Risk Score

Malware Insights

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

The PDF document contains a link farm with 17 distinct PDF links, many hosted on disposable domains, designed to redirect users to other sites. One of the primary redirector URLs is https://ttraff.ru/pify?keyword=cctv+camera+details+pdf, which is flagged as malicious. The document body text, though partially garbled, includes the phrase "Cctv camera details pdf", suggesting a lure to entice clicks on the embedded links. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=cctv+camera+details+pdf In PDF document text
    • http://files.starkeyoutdoors.com/uploads/1/3/1/4/131452794/joxuvalus.pdfIn PDF document text
    • http://files.sustainableartschool.org/uploads/1/3/2/6/132682819/fufim-manowuw.pdfIn PDF document text
    • http://files.adelaide-pilates.com/uploads/1/3/0/7/130775151/6c5a292706.pdfIn PDF document text
    • http://files.joannaruhl.com/uploads/1/3/1/3/131379789/8870089.pdfIn PDF document text
    • http://files.dlfinancial.org/uploads/1/3/1/3/131379749/tobij.pdfIn PDF document text
    • http://files.cobilconnect.com/uploads/1/3/0/9/130969853/6ea8d66a.pdfIn PDF document text
    • http://files.akilamstudio.com/uploads/1/3/2/6/132682565/dufojumam-sosufiwi.pdfIn PDF document text
    • http://files.ibteens.net/uploads/1/3/1/3/131383358/faxurugisuvuvef.pdfIn PDF document text
    • http://files.laanimal.com/uploads/1/3/1/3/131398164/6d1247d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vagiseni.files.wordpress.com/2020/06/zabirevi.pdfIn PDF document text
    • https://gorowedezer.files.wordpress.com/2020/06/474963070.pdfIn PDF document text
    • https://wuwiwil.files.wordpress.com/2020/07/setukoforamuvoximelone.pdfIn PDF document text
    • https://wikasiset.files.wordpress.com/2020/07/74430910228.pdfIn PDF document text
    • https://guganogu.files.wordpress.com/2020/07/41764598761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69901941500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/82365171426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/16625140795.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000694d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694D 4956 bytes
SHA-256: 26b2cf42cbdccf2ef11093f7ff030c1bdf67747d78255a6bd105dd5f4451c134
font_01_sfnt_off00007a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2F 10008 bytes
SHA-256: 1476c0f8d0e3adb05c201331001c05cea8964e301986c470a61f582b2a97ce81

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