Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fddc14d5b44787…

MALICIOUS

PDF

41.8 KB Created: 2020-10-31 07:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a15c31e65d97d310d1340de849211276 SHA-1: dbe6a35b4e99fac3d8ae547cca2298beadab61ed SHA-256: c5fddc14d5b447872c9b4b845710b8dc976ac8ced20c5f08792c1a4ca5664527
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and redirectors, indicating a phishing or scam attempt. The primary URL, https://gettraff.ru/aws?keyword=scholarships+for+irish+dancers, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to scholarships and URLs, reinforcing the lure. The ML classifier strongly indicates 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://gettraff.ru/aws?keyword=scholarships+for+irish+dancers In PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/b1e759d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_5f8da571ef391.pdfIn PDF document text
    • https://vobemebu.weebly.com/uploads/1/3/4/3/134383317/385049.pdfIn PDF document text
    • https://nofizosol.weebly.com/uploads/1/3/4/5/134500220/3ece8e99d82042.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/fikebigaromasifakuf.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/7544631.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/49005861813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4050/6524/files/2017_honda_foreman_bolt_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/drive_by_wire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f443bd3b-a159-46d7-8438-223cd9f2c13e/complete_guide_to_crystals.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/zalurezurimikivaf.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/kipupidilazixogidid.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/eloy_detention_center_visitation.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/nc_license_plate_agency_west_market_street_greensboro_nc.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/firosovuxomuzoz.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_off00006216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6216 5344 bytes
SHA-256: 2b0337f344689fba607115afe257f2a7bd6af2778136c92a0e52e40d5011729c
font_01_sfnt_off00007440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7440 11300 bytes
SHA-256: 128b36fc559d85544ec19035909ae8e226998fd21cf532d1e45e85dc578147ef

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