Malicious PDF — malware analysis report

Static analysis result for SHA-256 204605dd0df7b530…

MALICIOUS

PDF

52.9 KB Created: 2020-10-27 17:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2b6bbbf0fc90d6098f9509e604140000 SHA-1: bbeb478db1cb1b5fbb54b3af4d42627ab26bb2c2 SHA-256: 204605dd0df7b530c479a74c0c4681458785c6c31b456eb1da122d8fa4d91fc7
174 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 `https://ggtraff.ru/strik?keyword=premium+licence+for+picasa+tool+apk`. The document body also contains this URL, suggesting a lure to download potentially malicious content. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning attempt, likely to distribute malware.

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://ggtraff.ru/strik?keyword=premium+licence+for+picasa+tool+apk In PDF document text
    • https://kejedaxuz.weebly.com/uploads/1/3/4/3/134355680/369945.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/cce29bc.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/zolifovukub_mofogipuw_suwumop_vafinet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/43625371927.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/dissertation_problem_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/lerubeliwoxidel.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/articulos_sobre_energias_renovables.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0557/4819/files/dowos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3884/6359/files/2020_hyundai_elantra_bluetooth_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4922/1286/files/jevivuvivar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4263/3890/files/jugefiferulobun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9135/4534/files/95536578077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea1e4f1-0da7-4f93-8f5a-a6b41ebf3f2d/kobinarudaxebojir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f3d9e56-7865-4063-8b5e-968304c01609/futojefarimol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f1eda2-fb93-4970-9fd9-c84a3b242fa0/queer_a_graphic_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/390c7997-a670-4e73-9ac4-faa8043ff6ce/nobisabenunejepobuwuzata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c37c1430-b9f1-4d82-84cc-b7595733733e/91599228912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8039/3915/files/organisational_buyer_behaviour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/7th_grade_homework_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8887/4146/files/area_de_un_rectangulo_calculadora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9433/9481/files/vepam.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000723f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723F 5224 bytes
SHA-256: 006c330e9037baa5ca13788ea6e1d2bf4a10585d1e0affdebe9f9dd8043fe7b4
font_01_sfnt_off000083e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E7 13920 bytes
SHA-256: 86405b467fcb898c26bc6c1436f38125b58b757dbf5e749bad7de88c507ee007
font_02_sfnt_off0000b0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CF 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf