Malicious PDF — malware analysis report

Static analysis result for SHA-256 88fb33b4d71cb4c5…

MALICIOUS

PDF

41.7 KB Created: 2020-10-03 15:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0d2fc66b5dccab549d8377426025d2d5 SHA-1: dc91ac16aba81d13c345d7656e79241bbd25d6b2 SHA-256: 88fb33b4d71cb4c5f72f48ba301546c39c4c78b46403dbb85d87e5db92a43f36
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, ttraff.link, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL and references to 'Genesis in cursive', suggesting a lure. The presence of numerous Shopify links, while many are benign, indicates a potential link farm strategy to distribute malicious content.

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=genesis+in+cursive In PDF document text
    • http://files.beautyunderoneroof.com/uploads/1/3/0/8/130874205/145283.pdfIn PDF document text
    • http://files.jorgemolinaart.com/uploads/1/3/0/7/130738889/9473031.pdfIn PDF document text
    • http://files.delbertrowden.com/uploads/1/3/0/8/130813427/7686149.pdfIn PDF document text
    • http://files.chambersofpoe.com/uploads/1/3/0/9/130968962/wixevebiko.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/1/0435/6797/2513/files/dragon_nest_class_guide_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7386/3829/files/mugebekafabili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5605/6488/files/95281890682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7503/4524/files/i_couldnt_afford_a_present_spongebob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2882/3719/files/nalunaruwojagusewujogiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3239/5423/files/zakunujitilodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b22fe688-ae99-4e63-aed2-b288f9f8654d/52409431168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37250521-26a4-45d6-a30b-93ab97b2c7e5/5425125556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/568727b4-7511-4850-a090-6fd887710710/39661345501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03df2ac5-9c8b-455f-b986-84e26a880304/mavexokiwulofosetabulo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C1D 4644 bytes
SHA-256: c02cb910e4c89451e69c6a5d5e8ee6884906f352d5352d18260950bb9689dea6
font_01_sfnt_off00005c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C01 3036 bytes
SHA-256: f8dfaf232f54dab8568b8d64babdf4625176f3cb0c04fa9c198fafc83fbaac38
font_02_sfnt_off000068a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A4 14700 bytes
SHA-256: ded9b61adcb9fc251c5df7be60ca66fb8ba1e3e93f11b03155eabf9dcf4ac2e9

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