Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef951d74b2bf859…

MALICIOUS

PDF

44.5 KB Created: 2020-10-15 18:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3a48a6a8928f8260f5f382d8813cd8e2 SHA-1: 9126ca689940f3635bf25a81911ec672995948e1 SHA-256: 8ef951d74b2bf859139679e0382214febae7a29d561c9f34b8c0c9fccbfc1286
174 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/123?keyword=kerala+marriage+registration+form+pdf'. The document body, though heavily obfuscated, also contains this URL. Additionally, the PDF is flagged for containing a mass external PDF link farm, with one example being 'https://cdn-cms.f-static.net/uploads/4366965/normal_5f873901263d6.pdf'. The presence of these links and the ML classifier's high confidence score suggest a phishing or malware distribution attempt.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gettraff.ru/123?keyword=kerala+marriage+registration+form+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f873901263d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f873d27c410f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f872dded869f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f881bf417b57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f87621487cc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f883d0f5ccf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f8826daaafd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f87490e2f00f.pdfIn PDF document text
    • https://site-1038840.mozfiles.com/files/1038840/10634543003.pdfIn PDF document text
    • https://site-1042555.mozfiles.com/files/1042555/80619943085.pdfIn PDF document text
    • https://site-1048531.mozfiles.com/files/1048531/58815164059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f8739162bba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5f88316ae815e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f879dee76c0d.pdfIn 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/1/0434/6229/5716/files/9701231647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7808/3255/files/90308227053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f95eddc3-84e9-4e76-86be-5d6f7de61980/74362176961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ca0d11-8c27-4767-8ec0-933abe6f6312/gadavufewanabevufakavujas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0305d3f2-e6f3-406c-8e9b-349e9abfd019/23979651085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09fc1603-89f2-4b49-9924-28d1575f835d/fomep.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7097 5328 bytes
SHA-256: 75702300f4b3996bc8806d5792f598c6714cbbdb4c3c0701babadf70bcf26b32
font_01_sfnt_off000082a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A3 9852 bytes
SHA-256: 30c85cea4ddf0497a316f49fbe4733088687489aac28000e9f2886eaa22455dd

Open this report in the interactive analyzer, or submit your own file for analysis.