Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7002c2ef1009c63…

MALICIOUS

PDF

36.4 KB Created: 2020-09-18 23:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfdeae3cd065ef5359075cae8b03504d SHA-1: 41dd8fb3d0c1bd0eafd0b9bfba067ecc0eb68fe6 SHA-256: b7002c2ef1009c6340f754d42cbbc0025f2d42d94b1ce8093c4e592a45cbf0f1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with several pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.club/wix?keyword=apk+poke+legends, which is likely used to distribute further malicious content. 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.club/wix?keyword=apk+poke+legends
    • http://nidokumu.merrittbiology.com/uploads/1/3/2/6/132681268/zufipiruzorupa-lulimar-lijugimo-vazev.pdf
    • http://notikus.whereisseb.com/uploads/1/3/1/8/131857758/xunofapexo.pdf
    • http://files.bernadetteaustin.org/uploads/1/3/1/6/131637806/32eaf69a7.pdf
    • https://fc7184da-2dc3-41c7-a0c6-a4cbcc862cda.filesusr.com/ugd/db93e9_979a82bfdeb64328b84474f25cdff69a.pdf?index=true
    • https://81058f9b-218f-4b48-a142-be306c0042a5.filesusr.com/ugd/67e251_4f590c4552dc4e5b907c68784f419472.pdf?index=true
    • https://eea976ce-6ee9-4701-8707-f7ebb7a9cb38.filesusr.com/ugd/a31856_6c3b23fbef064f478b749c094d0adc04.pdf?index=true
    • https://47c0b57b-f690-48f9-9880-ef3d048dc062.filesusr.com/ugd/efc97f_e490fd847e58401e83559e2f86a5aaee.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/uniden_powermax_5._8_ghz_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/67095484475.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/veweg.pdf
    • https://cdn.shopify.com/s/files/1/0440/3471/9909/files/safojus.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/pet_trainer_cambridge_book.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000042b8.bin
360be05f9f6149d32a79e52ecdfbd735f5c2bc07a2d6fb0ad906c9df332febd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x42B8 4536 bytes
font_01_sfnt_off0000522d.bin
cd83d5ce95499c0eb0c32cf6b2a3d13ab99a911abaf1fedff64fc27d96385259
pdf-font-stream PDF embedded font (sfnt) at offset 0x522D 12724 bytes
font_02_sfnt_off0000777b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x777B 4324 bytes