Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ee66a8a751fa5c…

MALICIOUS

PDF

36.0 KB Created: 2020-08-30 20:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18c74e0057041948eca5c0ec14d7c114 SHA-1: 3fd5750691d14aa367d0a1227e1d8e6e8b03bff6 SHA-256: 93ee66a8a751fa5c3766f0f1de789eb3376db5ebcdd55ae2cd7085b51ba2813d
152 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links. One prominent URL, 'https://ttraff.ru/wix?keyword=mapa+interactivo+de+europa+union+eur', is flagged as a known malicious redirector. The presence of many links, including to 'https://static.usrfiles.com/ugd/b8c837_20652ef29dcb4abfa66273afb9b095cf.pdf', suggests a strategy to manipulate search engine results or to lure users to malicious destinations.

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=mapa+interactivo+de+europa+union+eur
    • https://static.usrfiles.com/ugd/b8c837_20652ef29dcb4abfa66273afb9b095cf.pdf
    • https://static.usrfiles.com/ugd/6da380_6449424376f243f0b294270cea43b5cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_3dd0371af56e42128cb15d9a4eb90424.pdf
    • https://static.usrfiles.com/ugd/b8c837_c046e6c9db3f4ae79f7e44e1e978235e.pdf
    • https://static.usrfiles.com/ugd/b8c837_48ec684d3f1248b9b2c7d97761c96360.pdf
    • https://static.usrfiles.com/ugd/b56239_f3a426d0b897439084702f2121417dce.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0fa4db60b674a3388cc40222cdd71c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_126fc4e8036b4a018433c4911e9352bf.pdf
    • https://static.usrfiles.com/ugd/fe83c3_1a0a5fc103254c2d84f81f30f46f7cb1.pdf
    • https://static.usrfiles.com/ugd/b7ed05_e86d6f29e5864fac87b03e3c5b6b33b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e25616a42784c19918a1d75b5424f0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a76236dc6014450881049cea60c599ec.pdf
    • https://static.usrfiles.com/ugd/7e6083_0a5bb8a0a0734895bdafec261abf8b79.pdf
    • https://static.usrfiles.com/ugd/b8c837_c007166d0c1f478d9e6c4c4778f2723f.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_off00004fdb.bin
ffa2e26708f4a6addd5d76291aaede4dcbf766cc73daf808d115944da5260385
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDB 4924 bytes
font_01_sfnt_off000060a5.bin
3ff08a1c280beccbc4fb3b06e5387568aff0a4ec31cea644d8d3798f74edf9c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A5 10204 bytes