Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe3c482d2af3d4b…

MALICIOUS

PDF

45.6 KB Created: 2020-09-11 18:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e99c27767793f206a5b7c346c846393c SHA-1: 7647b7587fbb50bf2ca64baa95248c3867f01cc8 SHA-256: 8fe3c482d2af3d4bd283718d54eec25a69a68708407729b7efd788417f5ae11d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text that appears to be a lure for 'Android studio example project pdf'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to malicious infrastructure. The ML classifier also strongly indicated 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.club/pify?keyword=android+studio+example+project+pdf
    • http://pugut.allykattdesigns.com/uploads/1/3/2/7/132712615/6221082.pdf
    • http://puzade.danielgscott.com/uploads/1/3/0/7/130740164/3e59e.pdf
    • http://vomolir.lawn-rite.com/uploads/1/3/0/7/130776489/1068286.pdf
    • https://static.usrfiles.com/ugd/05e3ad_bc4befe92ac34224a793ebadb094702d.pdf
    • https://static.usrfiles.com/ugd/d775a9_93d57237f35a4ef281a282cc47aaace3.pdf
    • https://static.usrfiles.com/ugd/868b90_865d46dec11a41f599fdd0018bce6ff5.pdf
    • https://static.usrfiles.com/ugd/a86d68_ba1327eadbac455e93413b693049bb00.pdf
    • https://static.usrfiles.com/ugd/9904c2_5f70b1dabbc84073bedd198f0567f066.pdf
    • https://static.usrfiles.com/ugd/a4c1fa_cefde32ad4104c03ab682f8f8ef52e7b.pdf
    • https://cdn.shopify.com/s/files/1/0440/3704/6422/files/apprendre_anglais_hors_ligne_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/setixinojed.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_off00007339.bin
efa71b3aed26729f702aa4904a5485e5d3b8e7ca2e84fe96e839510817ccde2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 5432 bytes
font_01_sfnt_off000085aa.bin
f92bb0635d2b58775847d810f33ad92267e19b2ba3a83c33ed870e5db3306a8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AA 10512 bytes

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