Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd005209aa5406b1…

MALICIOUS

PDF

38.2 KB Created: 2020-10-09 01:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c8bd2548c10c0667b1276b704ca4d2bb SHA-1: 739108b317b661a12ba7eddfb2d774fcf45cf4ac SHA-256: bd005209aa5406b15b347c482756df78e3196580fcbb6bff2301edfc180b80e4
154 Risk Score

Malware Insights

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

The PDF contains a lure for a "cube world level up hack" and embeds a link to a known malicious redirector. The document also functions as a link farm, pointing to numerous other PDFs hosted on striking.ly, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness.

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.link/pify?keyword=cube+world+level+up+hack In 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/931cf350-5ebe-49d6-9125-b06dcc43b4fb/tipusufazadovuzifepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d845c12-73db-405a-9a42-4c97c277afc1/67612141988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5515e973-fc00-459a-84c4-8e574a9f16a1/jiwisugabinopowaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea77ef4-3280-4f3c-bc6b-d6af99659de3/55746664986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c0ef52-fe8d-4389-a9f1-66f7e2281bc6/22224393219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/047a3387-b3a5-42de-9d52-c00c8346b13b/70825800078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8879/0179/files/moon_ball_pokemon_ultra_sun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2446/8126/files/the_goal_book_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8546/6267/files/words_for_perfect.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/96682188413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0955/8693/files/73731042053.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_off0000575f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x575F 5244 bytes
SHA-256: 62096b5220e0f1885ba0957bed061438792fc9bf4c4e1168866cc63ef5163942
font_01_sfnt_off0000693a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693A 10380 bytes
SHA-256: 2293703f4974e2ff7d8444a952eb771625f21df43725b6d4c16953d2fcbaa390

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