Malicious PDF — malware analysis report

Static analysis result for SHA-256 389fba766f7b3c28…

MALICIOUS

PDF

40.0 KB Created: 2020-10-04 01:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: eb946516235efc65f97ea0cb9be43149 SHA-1: 6277be3ed89ed425f2f7b219737dc3ae0bd5db93 SHA-256: 389fba766f7b3c28466f72ad1bef781e677393512efc760ec52f2c6a80166549
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and malformed streams, indicating malicious intent. It presents itself as "Mcdonalds assessment answers 2020" and contains numerous links, including one to a known malicious redirector at "https://ttraff.ru/pify?keyword=mcdonalds+assessment+answers+2020". This suggests the document is designed to trick users into clicking malicious links, likely leading to further exploitation or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.ru/pify?keyword=mcdonalds+assessment+answers+2020 In PDF document text
    • https://site-1039437.mozfiles.com/files/1039437/dapibikepawikupelanas.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/rodaxiravanibose.pdfIn PDF document text
    • https://site-1036746.mozfiles.com/files/1036746/38868971674.pdfIn PDF document text
    • https://site-1037048.mozfiles.com/files/1037048/47076518120.pdfIn PDF document text
    • https://site-1038378.mozfiles.com/files/1038378/fadop.pdfIn PDF document text
    • http://jukavol.rodbrunet.com/uploads/1/3/1/0/131070786/4786ed40de47.pdfIn PDF document text
    • https://site-1039324.mozfiles.com/files/1039324/fuwavavedef.pdfIn PDF document text
    • https://site-1039669.mozfiles.com/files/1039669/bijolomexe.pdfIn PDF document text
    • https://site-1038815.mozfiles.com/files/1038815/81513980148.pdfIn PDF document text
    • https://site-1036909.mozfiles.com/files/1036909/lugizazagixidowisag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd78dcc-098b-4db7-843a-9a389df6a4b1/48962458476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e117f0dd-777e-491e-af7e-df26aba14f87/luzejowanosiraxazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68b2cfe-b5a7-4e4e-ab73-809aa475d460/gigevisizew.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6E 5456 bytes
SHA-256: 43ceaaa20a1286498f74c5491a445bc838564e53f0244a0b5d5b11e5d76fc17f
font_01_sfnt_off00006efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFE 10828 bytes
SHA-256: b343dde0abe46d674e0b3726c7ec317e68988769f4caf8b05b896d7f17fe1313

Open this report in the interactive analyzer, or submit your own file for analysis.