Malicious PDF — malware analysis report

Static analysis result for SHA-256 9126449854131dfa…

MALICIOUS

PDF

44.5 KB Created: 2020-11-03 19:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c7ce1196b95da25beb9c069b9bf24b8 SHA-1: 53caa4107311da8734109b48d6f8a7b2d73e447e SHA-256: 9126449854131dfa024bce75e8dba78335108204e10a7274ebfa932b80ca8c69
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. Additionally, a machine learning classifier flagged the PDF as malicious with high confidence. The presence of a download button lure suggests a social engineering attempt to trick the user into downloading a payload. While no scripts were explicitly extracted, the PDF structure and malicious links indicate an attempt to redirect the user to a malicious download site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/123?keyword=gta+5+apk%252Bobb+download
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/62359cebce6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bidurudilidujug/gibberish_lyrics_max_backwards.pdf
    • https://s3.amazonaws.com/gosete/mtg_modern_abzan_sideboard_guide.pdf
    • https://s3.amazonaws.com/jamokaroxoj/erdas_imagine_tutorial_for_beginners.pdf
    • https://s3.amazonaws.com/vezumobigodub/80714292084.pdf
    • https://s3.amazonaws.com/xetasif/jinenepigimalipesume.pdf
    • https://s3.amazonaws.com/gotenukevepunin/xapibelatizapizibomiwa.pdf
    • https://s3.amazonaws.com/sabegokek/xaxikumebijudarokidapizu.pdf
    • https://s3.amazonaws.com/dazifozixawus/prueba_ser_bachiller_enero_2019.pdf
    • https://s3.amazonaws.com/pusolefosex/drivers_license_renewal_pa.pdf
    • https://s3.amazonaws.com/bopuxosavubare/exercicios_resolvidos_de_converso_de_binario_para_decimal.pdf
    • https://s3.amazonaws.com/kimoweworape/black_and_decker_pocket_power_user_manual.pdf
    • https://s3.amazonaws.com/farezelof/bigorifedadoburabavu.pdf
    • https://uploads.strikinglycdn.com/files/72f29997-7b65-4c6b-9f11-cf936a3acb5d/vavibilurogofubajemu.pdf
    • https://s3.amazonaws.com/bakoloj/92492811272.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_off00006e92.bin
e276c88e1d7d08ce3b5c4a1f520eceb2bb739a4815c8b9c1f32431cb42012a03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E92 5132 bytes
font_01_sfnt_off00008030.bin
e2c6aef0fe6d8b2d5c9403902b1a3e830558bd76144042f4df0dada3c4ed60e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8030 10800 bytes

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