Malicious PDF — malware analysis report

Static analysis result for SHA-256 6263e40a4d4b39c3…

MALICIOUS

PDF

44.9 KB Created: 2020-09-13 07:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bad87e266f99ccee445c5d3a957e5343 SHA-1: 685faecfda554444165f2171277e8ec5b3238dec SHA-256: 6263e40a4d4b39c3294e5725b5f76df58cd94d3f77e9b940a31308a196aa6159
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of an SEO link farm, aiming to attract users with search terms. The ML classifier strongly indicates malicious intent, likely 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.cc/wix?keyword=gillette+fusion+proglide+manual+razor+blades In PDF document text
    • http://files.readytoexhaleworkshops.com/uploads/1/3/2/6/132681517/zipolonamunixun-digixema-lesepugal-benibe.pdfIn PDF document text
    • http://files.theosophy-dunedin.org/uploads/1/3/1/4/131483019/xarika_fukuguluxugu_gemex.pdfIn PDF document text
    • http://files.mrschaeffer.com/uploads/1/3/1/6/131636941/c62227cf7.pdfIn PDF document text
    • http://files.gamezandmore.com/uploads/1/3/0/7/130739802/modijilurute.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://static.usrfiles.com/ugd/f3ecbe_f8c043b7f08a467382bc9eec1cd9ae21.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2486b5_95e9d1b97dc24ad3b63188229977a40f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d7be3290c59e42d39fbaece658f1d0a6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7dd30d_a6ac8c622ce44433a03c55fa25ebe8f0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3c9ac1_3b706f5ac69f4e078da22eab8f4a5435.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6da380_ec7dc18bd0b148de80bfb66d2f936945.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a18aa6_bdb92639de5943278fac104a10759ecc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9edd50_0d406bc319fb4d1387e886993197a4f9.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_off000049b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49B4 6872 bytes
SHA-256: de899525ead0c5d3fc7588270180909d4db594cb0fa0dcba094307b989a09f12
font_01_sfnt_off00006085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6085 5464 bytes
SHA-256: dff3de4defdaa26d4648a94d1095575ae20faf89b3b76e5f4d1acf201b32da01
font_02_sfnt_off000072ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FF 10384 bytes
SHA-256: db15e875ab99aee4b6f04e8bba45064b2b6081c5d2b8fa409e5fa1accc27acdd
font_03_sfnt_off0000966e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x966E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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