Malicious PDF — malware analysis report

Static analysis result for SHA-256 9256b37d176a9a45…

MALICIOUS

PDF

54.1 KB Created: 2020-10-25 10:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 95c330e3b4e55c397b00abace24695a8 SHA-1: 8d90f50c69cfb3182c5ec39692c5259ac62cb50a SHA-256: 9256b37d176a9a457a9e6efb391751966ac83477c6fea88c732b5778e881c4bc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, https://cctraff.ru/strik?keyword=vintage+craftsman+drill+press+manual, is flagged as a malicious redirector. The document also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, supporting the attack pattern of luring users to malicious infrastructure.

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://cctraff.ru/strik?keyword=vintage+craftsman+drill+press+manual In PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/pizemawozabiwi.pdfIn PDF document text
    • https://vutizimowunofe.weebly.com/uploads/1/3/4/3/134354130/2772280.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/2161657.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/sawuxezowob.pdfIn PDF document text
    • https://gefelamanak.weebly.com/uploads/1/3/4/3/134353999/gosumanaseb-naxejuvopup.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/3683425.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/997cbf5025e.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/1/0486/4154/0254/files/wuxere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2726/6217/files/mcgregor_theory_x_and_y_motivation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/2020_toyota_tacoma_manual_transmission_fluid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/xopefuxilefapojuzadelux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5089/2454/files/uma_vida_com_proposito_minhateca.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/architectural_design_of_residential_building.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/interview_questions_on_computer_networks.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/zirobagetekepexalataponu.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/58045832038.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/82773734150.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/hypertension_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/86980665554.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/putapuwagulotafimexij.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/54174406435.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/wolffia_arrhiza.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/semetug.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/wekoko.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/wezezimekipuletevujov.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_off0000952b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x952B 5440 bytes
SHA-256: 9196711c83528629b1e75f3c3bfeb3caf6a54cfa95d6eec589b87c1df588210d
font_01_sfnt_off0000a79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA79E 10140 bytes
SHA-256: 6f37f3946c7186b757fad7300be3a7f2db838fd840f93a9b5dcf17b7a4f5eb75