Malicious PDF — malware analysis report

Static analysis result for SHA-256 42203ebae992ee59…

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 16:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f42ed7a19cd9224c602a7a7ade0df5f SHA-1: a327f40987a0ed1a378c9a5a074963153ded186f SHA-256: 42203ebae992ee59e303f78588f1c441a274ac30a1a8080b30c1e8128d4e9353
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results for "Harry Potter film score sheet music", with the primary link pointing to a known malicious redirector. The document body is heavily obfuscated but contains the malicious URL. The ML classifier strongly indicates 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.ru/wix?keyword=harry+potter+film+score+sheet+music
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/89448785594.pdf
    • https://cdn.shopify.com/s/files/1/0433/7480/5148/files/bapasidekakega.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4051/files/fubazabirifabatolibev.pdf
    • https://cdn.shopify.com/s/files/1/0440/5886/9910/files/chapelle_expiatoire_exposition.pdf
    • https://static.usrfiles.com/ugd/26481d_bfa3d05207d44ad48c40654e83de0af9.pdf
    • https://static.usrfiles.com/ugd/30e015_2b2303b5822d4f5da8eda99b061d47d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c37149fb4284a5ab6f438377b4050a9.pdf
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/pexur.pdf
    • https://cdn.shopify.com/s/files/1/0428/5385/9494/files/exercises_for_radial_nerve_entrapment.pdf
    • https://static.usrfiles.com/ugd/c7a620_7291a30b8b5a43ef9c61157bade94023.pdf
    • https://static.usrfiles.com/ugd/1849a1_622c59652d1242ed83872b19de9c7a21.pdf
    • https://static.usrfiles.com/ugd/b8c837_15391b1509634ac7be1bed88aeae6e23.pdf
    • https://static.usrfiles.com/ugd/eb4c03_388a8a51ecae432ca23ef6a6a87b7fdb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061a5.bin
3c39f65a94851e7f40dc7380d888ee951c879a027640bdd375fabf160685ce91
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A5 5320 bytes
font_01_sfnt_off0000739a.bin
8c9a7f7182d9f9b543ba5005b441642853511964c557a0776ae55f863918fe99
pdf-font-stream PDF embedded font (sfnt) at offset 0x739A 10344 bytes