Malicious PDF — malware analysis report

Static analysis result for SHA-256 757e178229a6f5bf…

MALICIOUS

PDF

39.1 KB Created: 2020-10-15 17:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: da4c9efc39a9800c175e747a121743ac SHA-1: 4085c812056f2c428d3e2d2926228f62ab49ee70 SHA-256: 757e178229a6f5bf8a21734403383b0b9aa6cc56dc2f2e4c4732f4c2c11c7f75
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://cctraff.ru/strik?keyword=acrobat+dc+pdf+editor, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Acrobat dc pdf editor' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous other PDF links, many pointing to benign content hosting sites, indicates a potential link farm or SEO poisoning attempt to increase visibility of the malicious link.

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=acrobat+dc+pdf+editor In PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/bifoz.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7304884.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ede902-fe7b-4aeb-bf86-63bf7821c6a2/36078233621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232035ab-42d7-4511-9841-a0679d2dcfeb/sepalavota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b185d3-3e7a-458a-80ac-b6676ce74030/56927182807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4237/3283/files/51380921103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5465/1294/files/72446047787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed6e374-bc82-463e-a853-db7bcef4806e/tonugexuvogazunebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71718f38-5570-4282-b9f5-5971abfeb4b1/birifuwibevidewemanaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1036/6899/files/vuvaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4306/1909/files/jopalegotas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8698/0268/files/54521545210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/34230438806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4721/9100/files/85471531627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8327/0818/files/left_subclavian_vein_central_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6516/4454/files/minecraft_enchanted_golden_apple_seed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9393/7316/files/medimepovojemuzuloguli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/plural_of_mrs.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_off00005bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDE 5068 bytes
SHA-256: 1edcf56ba66098b2efc4ffcb6fbb066fe143c78a6a0bba1be5d03b249d0a7d1f
font_01_sfnt_off00006d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D20 10184 bytes
SHA-256: f1b1050cd237730a2d39f25c17cff2d3a7759a870450adfa1090923699ff1ef9

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