Malicious PDF — malware analysis report

Static analysis result for SHA-256 983795df60490d84…

MALICIOUS

PDF

66.3 KB Created: 2020-10-18 10:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5cfe906bfad3cca2192906afa08b1fc7 SHA-1: 60bd8b8b9057a8212f9c68a98886b892405baad7 SHA-256: 983795df60490d84358a47760cbf469426755c2991d0acdbefd20555f91bfc43
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful infrastructure. The document body, though heavily obfuscated, contains the same URL. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt, further supporting a malicious intent to drive traffic to potentially compromised or malicious sites.

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://gettraff.ru/strik?keyword=ejemplos+de+reproduccion+vegetativa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f87430212804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8b8002986df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f8bb03d1d3de.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/1/0432/3940/7784/files/84694855445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/unblocked_games_google_sites_for_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1396/2398/files/jazz_dance_terminology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7888/4759/files/satellite_communication_network.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4367/1194/files/rigumagiwaridaroxinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9681067f-1b94-4001-ae8e-7e7956bf69cc/30175353949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49dd8fb-deef-4b25-9ebc-d9a850468c67/mekinizix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5469/3529/files/bafuxadalirig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6474/1026/files/lofijazemadilamosanofila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3020/7400/files/masobonedatagosoxeganesud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/kerumoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0275/1905/files/graphing_systems_of_linear_equations_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3445/6476/files/kenmore_elite_ultra_wash_dishwasher_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/8038/3385/files/download_design_home_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/a_history_of_western_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6191d74-7234-4fff-8745-01ec8dcb28c2/desavufidutepenaweduza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14773fba-5914-4fd5-96aa-b1e2940a8122/mulasuvaxuxufowijuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f095983-ccb8-438a-b9da-19fe9e5e47ca/novugamoper.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_off0000c2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C0 5484 bytes
SHA-256: 783baa061a261e8fc1a5f7b44f9872db5fa2508a449a846315d452682a5f9b79
font_01_sfnt_off0000d561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD561 11196 bytes
SHA-256: 7985c7e39aa98af901f8261d338ba2b5f0eeb78b9cf5e3652241b3965cb7071f

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