Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6da36c7e762397…

MALICIOUS

PDF

51.1 KB Created: 2020-11-01 14:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 452df738c23d61860886d1f5297d8695 SHA-1: 880bff4e05e40ab704da09e18de10eea49cec969 SHA-256: bb6da36c7e7623975e4649063e691b1f29007fdad8e4dfc9d251a1675b9e8e5e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains keywords related to a school and a URL that appears to be part of a link farm designed 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.cc/123?keyword=farley+elementary+school+stony+point+ny In PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/dudipa_xujupatu_zovuwewadowav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f8723bc3a632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f87602a612c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f9e4db430bb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446289/normal_5f9d9e61c8343.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/1396268.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/tosalijakesuxulogu.pdfIn PDF document text
    • https://totapige.weebly.com/uploads/1/3/1/4/131483287/kefipafanane-divipisizox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_5f924f1112538.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/1/0434/6734/1974/files/50149078411.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/23603120863.pdfIn PDF document text
    • https://s3.amazonaws.com/jaburirarov/my_time_at_portia_nora_cheating.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/59529738757.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C22 5228 bytes
SHA-256: dd622aea0e4606f7fd084b8797fc198c98e4ece3f8f913ff3b33694e9b7495c9
font_01_sfnt_off00006dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC2 2140 bytes
SHA-256: 49dddaa543544930169c80d10742cf71a10a90771d945bdf421e53748b1fa594
font_02_sfnt_off0000779c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779C 11404 bytes
SHA-256: 04977f966aba0d1bb2edd0f9caffa2324621f25dbb42864fbd51dc9f12c45dc7
font_03_sfnt_off00009dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DEE 19624 bytes
SHA-256: 9dc8735242eea494fc0fd738b59ca1d992af23e124ec4af09bbce267094ea6d2

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