Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a619eed6314dc7…

MALICIOUS

PDF

43.7 KB Created: 2020-10-01 11:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6a196fc2e447f234985f8b0f7f385bb4 SHA-1: 9ffb620abfac456bd603e61a033ee68131117aab SHA-256: 07a619eed6314dc7ead7bf312f91161187f531a55af5cb77b2e1404d332cd98d
184 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://gettraff.ru/strik?keyword=anastasio+aquino+libro+pdf. It also exhibits characteristics of a link farm, with numerous external PDF links hosted on various domains. While no scripts were extracted, the presence of malicious links strongly suggests an intent to redirect users to harmful content.

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://gettraff.ru/strik?keyword=anastasio+aquino+libro+pdf In PDF document text
    • https://site-1037176.mozfiles.com/files/1037176/lugoxoludefiliwezinu.pdfIn PDF document text
    • http://files.portlandpipes.com/uploads/1/3/1/4/131437139/muvapoliwovozepo.pdfIn PDF document text
    • http://juzoza.paintballpa.com/uploads/1/3/1/4/131406202/soxebopukima_kekagidexav.pdfIn PDF document text
    • http://xaremube.creepyoutfitlab.com/uploads/1/3/1/0/131070374/pibaxevinisexojifiz.pdfIn PDF document text
    • http://zazoxobit.salhos.com/uploads/1/3/1/3/131398372/c16cc8d.pdfIn PDF document text
    • http://files.bbeautyco.com/uploads/1/3/0/7/130740112/sekutonirebobewifed.pdfIn PDF document text
    • http://files.grimbuilders.com/uploads/1/3/0/8/130813489/bixitun_zibadem_kekolijuzelupek_wizazanawobek.pdfIn PDF document text
    • http://gunape.camandmica.com/uploads/1/3/1/6/131637830/tikoligerelanenup.pdfIn PDF document text
    • http://files.saintmatthiasschool.org/uploads/1/3/2/6/132681976/9fe35bf346943.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/4b33e19d-dffe-4ea3-942a-4c4445231b56/ferefemev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa7f984-4106-4d83-803f-677b811f45ec/41411941700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e1d5c0-f929-4373-855b-7eccf1672411/kusoko.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_off00005ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDD 5052 bytes
SHA-256: 905c8841f4eed0eeb86db01fa02643cabd97111cb586d9f2036b624616d91d5d
font_01_sfnt_off00006efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFA 10876 bytes
SHA-256: 3b100bca5693c6dc9c7ccc16422db65a1e89ef9755d38f23f38e7b939199254f
font_02_sfnt_off0000928e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333