Malicious PDF — malware analysis report

Static analysis result for SHA-256 17eb162810968e88…

MALICIOUS

PDF

38.7 KB Created: 2020-08-30 09:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90fb4c3d35a896f2c335326a5591feda SHA-1: 64ba6f3e7f4e41565a83d9c4d8fdaa38b1130fc5 SHA-256: 17eb162810968e880460cff100b0fa4e7147d9864fc87f51c906e0dbeb69b933
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with a critical heuristic identifying a malicious redirector URL. The document body, though heavily obfuscated, contains references to the malicious URL and appears to be part of a link farm strategy. The ML classifier strongly indicates maliciousness, suggesting the intent is to redirect users to harmful 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=articulate+storyline+360+tutorials+p
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/6c98bc_3caed0aae7c64d57bb9c78eeddfb3634.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d928d30a28b4f8c87529791b03cfff4.pdf
    • https://static.usrfiles.com/ugd/b8c837_a204aadcb32040fea2a3631dabc818db.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fcc576ca8564adf9185efd0e838529a.pdf
    • https://static.usrfiles.com/ugd/158fb9_b11a237aaa384d02a1e6df654179721e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9b01d07d95c4b9e85287a58ed98cc9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d6759e29eed4ea8a56e2cfeeed540e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f39526450b84a16907df117671e9271.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/85015105221.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75278808376.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1256/files/tugixapenawafijakisenu.pdf
    • https://static.usrfiles.com/ugd/913720_3869526fa40b4bc1b688cf0c25b9772c.pdf
    • https://static.usrfiles.com/ugd/91e123_e9a93eae0a2843f69758356633c8f4dc.pdf
    • https://static.usrfiles.com/ugd/c20ea7_d1190b59bc4e482888a5fae318e2e7bc.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_off00005925.bin
f2ddadb865a47f54fb7f7f6e66f44b69f8635db5db1f7579bf6421e0a81b69d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5925 5480 bytes
font_01_sfnt_off00006bd1.bin
5afbf95c8c213b44726181782c71da62206c20d084af04a1e55517c1a5b70dd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD1 10104 bytes