Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f159cbe7f34b09…

MALICIOUS

PDF

60.1 KB Created: 2020-08-24 15:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f117a52dad9478b0d6d8e5423d1e8a4 SHA-1: 76d20f800f0b411b3e7808ab3fe938953aa68863 SHA-256: 75f159cbe7f34b095561146eb5aaf47aaa157f24403636447447b2ccc2a9a3c4
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware delivery.

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/pify?keyword=template+ppt+plus+animasi
    • http://palidef.walkerfarmshoney.com/uploads/1/3/0/8/130814761/468475.pdf
    • http://files.helpasmokerinrecovery.org/uploads/1/3/2/3/132303170/kekuse.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/bivaxasototijokoxam.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/dijibujuxorozeloredivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/pevijuguk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/7776886126.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/4960561515.pdf
    • https://cdn.shopify.com/s/files/1/0437/7637/6983/files/spain_embassy_in_kuwait_visa_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/69969765018.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/excel_templates_weekly_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2247/files/75113892046.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a38d.bin
3d192c86753cbf2ef1e6976e80f05fee269564459575d1f5a0cf0039f5fd8bcf
pdf-font-stream PDF embedded font (sfnt) at offset 0xA38D 4588 bytes
font_01_sfnt_off0000b302.bin
89e0992616ac66d73d3ae945b268493e1b6f63eeb2b83b65e0c688d545ba7625
pdf-font-stream PDF embedded font (sfnt) at offset 0xB302 10212 bytes
font_02_sfnt_off0000d5bc.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BC 4324 bytes