Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e086d2c0305a74…

MALICIOUS

PDF

39.6 KB Created: 2020-09-04 20:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7f51d3312106de995d5a40289395911 SHA-1: 08df922a3b5f85217b691de9ea8b71f9ddc003da SHA-256: 02e086d2c0305a7452e01643908856272d19b55d825ccb03663b52f57920c938
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with one prominent link directing users to a malicious redirector. The document body, though heavily obfuscated, contains text related to creating an Android chatbot app, likely serving as a lure. The presence of numerous external links suggests an attempt to drive traffic to potentially malicious sites or to distribute further payloads.

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=create+a+chatbot+android+app
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/07e02c_d3b028b07afb4cceaf5e4279c941aeb3.pdf
    • https://static.usrfiles.com/ugd/a18aa6_abc4e17b2c2a4f489d55580941575aad.pdf
    • https://static.usrfiles.com/ugd/b8c837_4beb8039afed4e47a032263a46b8e020.pdf
    • https://static.usrfiles.com/ugd/a4d998_3837490fe96644399d690690a4b34b3c.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_2a35a0db67c34a8d904966f795005bb2.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_e8cd37ea3b8c438e81b9140832917000.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_0a6302c492e84103901338435ce96761.pdf
    • https://static.usrfiles.com/ugd/fef806_67c0dc7dd8f04026aeea32d57bee4ed2.pdf
    • https://static.usrfiles.com/ugd/4cd51e_a9f5beff07734fad96ae4338cbca5cbe.pdf
    • https://static.usrfiles.com/ugd/f55bec_3a8078b480724fc988729abc0ccc18fb.pdf
    • https://static.usrfiles.com/ugd/8c2e83_4204151ca6824a93a65eae75fdcaaec8.pdf
    • https://static.usrfiles.com/ugd/10b11f_7347b2b8e8da4f85a9ac16f794240e19.pdf
    • https://static.usrfiles.com/ugd/3b47cb_2d09f62a08ff48c29b87f19ab8ffb669.pdf
    • https://static.usrfiles.com/ugd/2ac701_08b47afa064148869abf907b25ef996f.pdf
    • https://static.usrfiles.com/ugd/e0d0cf_4ef580049bf8432fa6f97c8c259b4a20.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f3d.bin
4c2d8fb7249729923bc0d8979b6bb47346861a0292e42b9ccc840e6e63243a2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3D 4996 bytes
font_01_sfnt_off00007028.bin
045bcbcc99340170f2ffd40b120f5af2fd18cf468f83a53dd799d71450cdbe72
pdf-font-stream PDF embedded font (sfnt) at offset 0x7028 9776 bytes