Malicious PDF — malware analysis report

Static analysis result for SHA-256 da26f2ef144c126a…

MALICIOUS

PDF

65.2 KB Created: 2020-09-30 12:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7d8c7661cbbc8cb69985c9cd6e3799ee SHA-1: b2fa3386c9bc181c5170ade7cca2f7c1ca65e391 SHA-256: da26f2ef144c126a01aaf63492b32365b203a049ce5100ac87720638eff234c5
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector pointing to 'https://ggtraff.ru/strik?keyword=angular+6+material+tutorial+pdf'. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to disguise malicious content as a tutorial. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the ultimate destination.

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://ggtraff.ru/strik?keyword=angular+6+material+tutorial+pdf In PDF document text
    • http://files.milantownship.org/uploads/1/3/1/8/131871979/dujez.pdfIn PDF document text
    • http://nupeme.clearlyjoewhite.com/uploads/1/3/1/4/131455069/jumuvemogoj-wuwuvebozuru-bejazetobomup.pdfIn PDF document text
    • https://site-1037152.mozfiles.com/files/1037152/toriforaravusoku.pdfIn PDF document text
    • https://site-1036731.mozfiles.com/files/1036731/fujewal.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/xopebema.pdfIn PDF document text
    • https://site-1037207.mozfiles.com/files/1037207/pulurevifamopimamedinalew.pdfIn PDF document text
    • https://site-1038556.mozfiles.com/files/1038556/77270354810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3515/2804/files/jiwer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7813/0593/files/tazosefokovodaxajudik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/82532321177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/8145/7824/files/14165360035.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8B 5208 bytes
SHA-256: 0ca48626304c22b55dab6bad60f27d5d4e79948f0a9cf677313c8a9487c59593
font_01_sfnt_off0000ad1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1C 3120 bytes
SHA-256: fde507d3e12ec33e68adf7e75fc7402ffd28b0db1492fb6dd1e3c49ab7b9519b
font_02_sfnt_off0000b9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A1 15188 bytes
SHA-256: d28d06a704e338ce0c27b35673651c42361d39580853cf08710737ee3aa2bfab
font_03_sfnt_off0000e965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE965 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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