Malicious PDF — malware analysis report

Static analysis result for SHA-256 631c64b72d759923…

MALICIOUS

PDF

40.8 KB Created: 2020-08-15 18:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5907af9d4b2313b5a9f9029e53a1df5 SHA-1: ba290b44a30961158c0b53e824a33be76b54d0cc SHA-256: 631c64b72d7599239f38096688984c87b8d13917499868dfcc2b1d827bfd929e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=beats+solo+3+instruction+manual'. The document body, though partially corrupted, also contains this URL, suggesting a lure to a malicious site disguised as an instruction manual. The presence of multiple PDF links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially 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.ru/pify?keyword=beats+solo+3+instruction+manual
    • http://vejatisir.egfhc.com/uploads/1/3/2/3/132303382/7971862.pdf
    • http://files.somewhereintimeathens.com/uploads/1/3/1/4/131412181/foxotiwitisa_tiwujexowib_nidipu.pdf
    • http://sifadapuv.brcwrt.com/uploads/1/3/0/9/130969858/3955794.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/fathers_rights_survival_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5578/files/dokaxorokewetomefux.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/matrix_information_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2359/files/70907028062.pdf
    • https://cdn.shopify.com/s/files/1/0436/9409/6539/files/figawijipevovo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/software_project_inception_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/78375405196.pdf
    • https://cdn.shopify.com/s/files/1/0436/1833/6925/files/avian_influenza_in_poultry.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/84019274970.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/xbox_one_bluetooth_controller.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_off0000622b.bin
31114ffae963ba7ad2b2fe42e1570bdecaa9ccc75942e106b966c66f11db5413
pdf-font-stream PDF embedded font (sfnt) at offset 0x622B 5156 bytes
font_01_sfnt_off00007397.bin
197275dc7725a5260a904f8e1335f0b0400978ca47fb0b4d1331fbf6cff5a97a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7397 10292 bytes