Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfc2e874f68e410…

MALICIOUS

PDF

53.4 KB Created: 2020-09-18 00:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f649291e500327a8a42342796fb3e495 SHA-1: ae64efbd452af4cd14f9bc152287a7cdef0edf6e SHA-256: 5cfc2e874f68e410bcc61efdd0232a4433b5acd1566ca62fdf3e436266bed0e5
154 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Leica rangemaster 1600 b instructions' but is primarily a link farm designed to redirect users to numerous other PDFs. One of the primary links, 'https://ttraff.link/wix?keyword=leica+rangemaster+1600+b+instructions', is flagged as a malicious redirector. The ML classifier also 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.link/wix?keyword=leica+rangemaster+1600+b+instructions
    • http://kaxub.onceuponacanvasbenicia.com/uploads/1/3/1/3/131383748/dabiwujuk_bikakuxet_kisuladeda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.pdf
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/contract_annex_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/xesokadika.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4567/files/fibunuzumoparu.pdf
    • https://2272224c-d58b-474d-be5b-ca9da301a64e.filesusr.com/ugd/4329d7_17c4b73cddad4d9c850da66842dac06e.pdf?index=true
    • https://819548db-db8d-4bf5-9062-bc10a3bc3d04.filesusr.com/ugd/04e6f9_4d207c73e90941eaa91bb910aa3a4158.pdf?index=true
    • https://d510c639-2400-41ce-99ad-1aaf35f528eb.filesusr.com/ugd/26f730_35d10b62cccf4fa5a644df483eaa20a3.pdf?index=true
    • https://13a96bab-0b2a-45d6-8050-935ef3ca20ed.filesusr.com/ugd/594ae5_aa6e5315836541aab901cab872c7c58f.pdf?index=true
    • https://7d721fe8-3238-4f61-b4cd-0c22466065d0.filesusr.com/ugd/9374a7_9b72cd0b33654dd3ad642a595fc4e127.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0483/7241/6670/files/94901825466.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/zipuxalotubemasuletu.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_off000084db.bin
9cfd5427b7b07456150b5b7d85e89989b1b79b0ef38371de6505271018786d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84DB 5396 bytes
font_01_sfnt_off00009717.bin
6c2deec6b8392a5d7df94576463063bdf0000ef75d975ce396c2d54e75fdd6e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9717 10588 bytes
font_02_sfnt_off0000baec.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEC 4324 bytes

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