Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c28c8b457555286…

MALICIOUS

PDF

39.5 KB Created: 2020-08-23 04:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1460ca8160b353e91dcc6bb60fa8769 SHA-1: e0f94cd62c89501f6a529c72e86931406ffbeaf0 SHA-256: 3c28c8b45755528655d4c3395e8fead263ce992e54205ed49230b227a7d535c8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. It also features a link farm with numerous SEO-optimized PDF links, suggesting an attempt to manipulate search engine results for malicious purposes. The primary malicious URL identified is https://ttraff.ru/pify?keyword=srimad+bhagavatam+sanskrit+pdf+free, which is likely used for phishing or malware distribution.

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://ttraff.ru/pify?keyword=srimad+bhagavatam+sanskrit+pdf+free
    • http://files.rachaellongsculpture.com/uploads/1/3/0/7/130775413/bae428037.pdf
    • https://cdn.shopify.com/s/files/1/0430/9290/2039/files/lesubomokewefinage.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7347/files/tangent_galvanometer_experiment_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0434/0908/0477/files/kizoraxovogixuro.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7918/files/9_line_medevac_card.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/etapas_carcinogenesis.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6953/files/xovov.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/65344091178.pdf
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/34120540919.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/lifting_equipment_inspection_checklist_template_south_africa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005921.bin
7aeefa9848c2123274235c14ce3b8f877deb8452cd4653f995162725f715e20e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5921 5792 bytes
font_01_sfnt_off00006cac.bin
d2624b30615f947d0c0b5dfcf43458e24ea35ef076ab35f76a3da60027f35a8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAC 10928 bytes

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