Malicious PDF — malware analysis report

Static analysis result for SHA-256 609c469befcc2a53…

MALICIOUS

PDF

93.1 KB Created: 2020-09-30 02:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a74a5f6a1c77311162feb8572bda636e SHA-1: e35fd2b90777fd75564bae9a574c180c7312eb09 SHA-256: 609c469befcc2a5351a5bbd2d79821d3e1a859211c644a63d5827db3afb47210
184 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with several pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to distribute malicious content or phish users. No scripts were extracted, but the overall structure and link distribution are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.club/pify?keyword=2008+ford+f350+super+duty In PDF document text
    • http://fipob.marcoaltini.com/uploads/1/3/1/4/131482826/wojisodarupupifu.pdfIn PDF document text
    • http://files.centralsprings.net/uploads/1/3/1/1/131163751/kutiwivasa.pdfIn PDF document text
    • http://files.beauty-sense-tx.com/uploads/1/3/1/4/131437849/rusoviforale.pdfIn PDF document text
    • http://files.darlingdeviance.com/uploads/1/3/1/6/131606260/wazetub-zasepo-daxudir-xebepuvofefoki.pdfIn PDF document text
    • http://wiguti.hamiltonpotterytools.co.nz/uploads/1/3/1/4/131408899/resegel.pdfIn PDF document text
    • http://jufoviba.mollymcdavittcounseling.com/uploads/1/3/0/8/130814283/gowaxegamiza.pdfIn PDF document text
    • http://koxumoxaj.formartinecommunitycouncils.co.uk/uploads/1/3/2/6/132682233/lokebekan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cc279844-7a45-4288-834e-aa482f557c69/10428494172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c9355b7-03a6-408c-a7fd-c96e0c3f69a0/zamixasasekebimivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a99b1db-1c3c-4055-abfa-520b90bc763c/70379714216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be0566e-b935-44ca-9174-f6fb173e383b/vapegekizakiregimabota.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001058a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058A 5284 bytes
SHA-256: 103b4a86f6b3a7222519136a2d53724c99235b793c4232e6dc7c0dffe761917f
font_01_sfnt_off00011795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11795 13956 bytes
SHA-256: 978c0cd6dcf402b3207a28f04aa85bd74e4059770fa8fbc368d83a33c1d6cdec
font_02_sfnt_off000143e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E7 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833
font_03_sfnt_off0001587b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1587B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c