Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f514ece456e9d1…

MALICIOUS

PDF

43.1 KB Created: 2020-09-04 01:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4f213b5227a1443dbeede0c96f1c30b0 SHA-1: b3bf15d392df869c56a905a7df6e8d054e534821 SHA-256: 90f514ece456e9d13c5c5c08f75fd94d0f89f839d5a461d312afedab0e9a0d2a
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though partially corrupted, includes text related to 'Dexa scan guidelines for males' and the malicious URL, suggesting a phishing or scam attempt. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic 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.cc/wix?keyword=dexa+scan+guidelines+for+males In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b9a42f47445e48849989b37a702e4ada.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/429b25_0e8e60d610b44ffa8d46897bd1d31d0a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d48fe3_fbd38b20159b46e0a5cbed590ce12200.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2c608b_f413940bfb7f44ed9a554789acb2b589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6845/6102/files/zuxatanusakusewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5777/3728/files/56594484384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8011/2535/files/best_free_android_backup_to_pc_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9768/5157/files/avs_video_editor_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/css_only_accordion.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ce77c6_2a6792c0e9594cd3914375fe2eef7a0f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c4a1241efb154e09aea32844d3733e53.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_off0000687d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687D 5408 bytes
SHA-256: 530a6777c2321fe4ac731db12206574840ee99bd96f02ff9eac8ad0a99516847
font_01_sfnt_off00007ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD4 10948 bytes
SHA-256: ff6e8d0ca6aa22a19410592e85d201c89c0e6c76e05c43723d10b0b577a3f28e

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